GHSA-f4cv-xm48-3694
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Confidentiality-only credential leak (C:L, I:N, A:N); depends on a specific set-then-clear handle-reuse pattern so AC:H; no attacker auth required, hence PR:N.
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Primary rating from Vendor (CNA).
CVSS VectorVendor
Lifecycle Timeline
5Description PRE-NVD
Articles & Coverage 1
AnalysisAI
Proxy-credential leakage in libcurl (curl 8.8.0 through 8.20.0) occurs because a request to clear previously set proxy authentication credentials is silently ignored, so the stale username/password remain attached to the reused easy handle and are sent on later transfers that were never meant to use them. This is an information-disclosure defect (tagged Information Disclosure, EUVD-2026-41510) affecting applications that reuse libcurl handles across multiple proxied requests. No public exploit identified at time of analysis and EPSS is low (0.25%, 16th percentile), consistent with a coding/logic flaw rather than a directly weaponizable remote bug.
Technical ContextAI
libcurl exposes CURLOPT_PROXYUSERPWD / CURLOPT_PROXYUSERNAME / CURLOPT_PROXYPASSWORD (and related options) on a reusable 'easy handle.' The intended contract is that setting these to NULL/empty clears the stored secret before the handle is reused. The flaw is that the clearing operation does not actually wipe the internal credential state, so the old proxy credentials persist and are automatically applied to subsequent transfers on the same handle - even ones directed at a different proxy or origin. The root-cause class is improper clearing/removal of sensitive information (akin to CWE-212 'Improper Removal of Sensitive Information Before Storage or Transfer'); the input lists CWE as N/A. Because curl is both a ubiquitous command-line tool and, as libcurl, an embedded HTTP library in countless applications and language bindings, the behavior surfaces anywhere handle reuse plus credential reset is used as a programming pattern.
RemediationAI
Patch available per vendor advisory: upgrade curl/libcurl to the fixed release published on curl.se (curl.se/docs/CVE-2026-9079.html); the input does not state an exact fixed version number, but the fix lands in the release following 8.20.0, so update to that or the newest available build - do not remain on 8.8.0-8.20.0. Distribution users should apply the packaged fix, e.g. Ubuntu USN-8487-1 (ubuntu.com/security/notices/USN-8487-1), and rebuild/redeploy any statically linked applications and language bindings that embed libcurl. As a code-level workaround where immediate upgrade is impossible, avoid relying on clearing proxy credentials on a reused easy handle: allocate a fresh curl easy handle (curl_easy_init) for transfers that must not carry prior proxy credentials, or call curl_easy_reset before reusing a handle - the trade-off is losing connection/handle reuse efficiency. Operationally, treat any proxy credentials that may have leaked to unintended proxies as compromised and rotate them.
Stack-based buffer overflow in the Curl_sasl_create_digest_md5_message function in lib/curl_sasl.c in curl and libcurl 7
The sanitize_cookie_path function in cURL and libcurl 7.31.0 through 7.41.0 does not properly calculate an index, which
When doing HTTP(S) transfers, libcurl might erroneously use the read callback (`CURLOPT_READFUNCTION`) to ask for data t
When curl < 7.84.0 saves cookies, alt-svc and hsts data to local files, it makes the operation atomic by finalizing the
Curl_smtp_escape_eob in lib/smtp.c in curl 7.54.1 to and including curl 7.60.0 has a heap-based buffer overflow that mig
A cleartext transmission of sensitive information vulnerability exists in curl <v7.88.0 that could cause HSTS functional
A path traversal vulnerability exists in curl <8.0.0 SFTP implementation causes the tilde (~) character to be wrongly re
A vulnerability in input validation exists in curl <8.0 during communication using the TELNET protocol may allow an atta
A double-close vulnerability exists in libcurl when tearing down connection channels after threaded name resolution, cau
A use of incorrectly resolved name vulnerability fixed in 7.83.1 might remove the wrong file when `--no-clobber` is used
curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when
curl 7.20.0 through 7.70.0 is vulnerable to improper restriction of names for files and other resources that can lead to
Same weakness CWE-522 – Insufficiently Protected Credentials
View allSame technique Information Disclosure
View allVendor StatusVendor
SUSE
Severity: Important| Product | Status |
|---|---|
| SLES15-SP5-CHOST-BYOS-SAP-CCloud | Affected |
| SLES15-SP6-CHOST-BYOS | Affected |
| SLES15-SP6-CHOST-BYOS-Aliyun | Affected |
| SLES15-SP6-CHOST-BYOS-Azure | Affected |
| SLES15-SP6-CHOST-BYOS-EC2 | Affected |
| SLES15-SP6-CHOST-BYOS-GCE | Affected |
| SLES15-SP6-CHOST-BYOS-GDC | Affected |
| SLES15-SP6-CHOST-BYOS-SAP-CCloud | Affected |
| SLES15-SP7-CHOST-BYOS-Aliyun | Affected |
| SLES15-SP7-CHOST-BYOS-Azure | Affected |
| SLES15-SP7-CHOST-BYOS-EC2 | Affected |
| SLES15-SP7-CHOST-BYOS-GCE | Affected |
| SLES15-SP7-CHOST-BYOS-GDC | Affected |
| SLES15-SP7-CHOST-BYOS-SAP-CCloud | Affected |
| SUSE Linux Enterprise Desktop 15 SP7 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | Affected |
| SUSE Linux Enterprise Micro 5.3 | Affected |
| SUSE Linux Enterprise Micro 5.4 | Affected |
| SUSE Linux Enterprise Micro 5.5 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | Affected |
| SUSE Linux Enterprise Server 15 SP7 | Affected |
| SUSE Linux Enterprise Server 16.0 | Affected |
| SUSE Linux Enterprise Server 16.1 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | Affected |
| SUSE Linux Micro 6.0 | Affected |
| SUSE Linux Micro 6.1 | Affected |
| SUSE Linux Micro 6.2 | Affected |
| openSUSE Leap 16.0 | Affected |
| SLES15-SP3-CHOST-BYOS-Aliyun | Affected |
| SLES15-SP3-CHOST-BYOS-Azure | Affected |
| SLES15-SP3-CHOST-BYOS-EC2 | Affected |
| SLES15-SP3-CHOST-BYOS-GCE | Affected |
| SLES15-SP3-CHOST-BYOS-SAP-CCloud | Affected |
| SLES15-SP4-CHOST-BYOS | Affected |
| SLES15-SP4-CHOST-BYOS-Aliyun | Affected |
| SLES15-SP4-CHOST-BYOS-Azure | Affected |
| SLES15-SP4-CHOST-BYOS-EC2 | Affected |
| SLES15-SP4-CHOST-BYOS-GCE | Affected |
| SLES15-SP4-CHOST-BYOS-SAP-CCloud | Affected |
| SLES15-SP5-CHOST-BYOS-Aliyun | Affected |
| SLES15-SP5-CHOST-BYOS-Azure | Affected |
| SLES15-SP5-CHOST-BYOS-EC2 | Affected |
| SLES15-SP5-CHOST-BYOS-GCE | Affected |
| SLES15-SP5-CHOST-BYOS-GDC | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | Affected |
| SUSE Linux Enterprise Installer Updates 15 SP4 | Affected |
| SUSE Linux Enterprise Installer Updates 15 SP5 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP4 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | Affected |
| SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE | Not-Affected |
| SUSE Linux Enterprise Server 12 SP5 | Not-Affected |
| SUSE Linux Enterprise Server 12 SP5-LTSS | Not-Affected |
| SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security | Not-Affected |
| SUSE Linux Enterprise Server 15 SP4 | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | Affected |
| SUSE Linux Enterprise Server 15 SP5 | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | Affected |
| SUSE Linux Enterprise Server 15 SP6 | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | Affected |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | Not-Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | Not-Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | Affected |
| SUSE Manager Proxy 4.3 | Affected |
| SUSE Manager Proxy LTS 4.3 | Affected |
| SUSE Manager Retail Branch Server 4.3 | Affected |
| SUSE Manager Retail Branch Server LTS 4.3 | Affected |
| SUSE Manager Server 4.3 | Affected |
| SUSE Manager Server LTS 4.3 | Affected |
| SUSE CaaS Platform 3.0 | Not-Affected |
| SUSE CaaS Platform 4.0 | Not-Affected |
| SUSE Enterprise Storage 6 | Not-Affected |
| SUSE Enterprise Storage 7 | Affected |
| SUSE Enterprise Storage 7.1 | Affected |
| SUSE Linux Enterprise Desktop 11 SP3 | Not-Affected |
| SUSE Linux Enterprise Desktop 11 SP4 | Not-Affected |
| SUSE Linux Enterprise Desktop 12 | Not-Affected |
| SUSE Linux Enterprise Desktop 12 SP1 | Not-Affected |
| SUSE Linux Enterprise Desktop 12 SP2 | Not-Affected |
| SUSE Linux Enterprise Desktop 12 SP3 | Not-Affected |
| SUSE Linux Enterprise Desktop 12 SP4 | Not-Affected |
| SUSE Linux Enterprise Desktop 15 | Not-Affected |
| SUSE Linux Enterprise Desktop 15 SP1 | Not-Affected |
| SUSE Linux Enterprise Desktop 15 SP2 | Affected |
| SUSE Linux Enterprise Desktop 15 SP3 | Affected |
| SUSE Linux Enterprise Desktop 15 SP4 | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | Affected |
| SUSE Linux Enterprise Desktop 15 SP6 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 | Not-Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | Not-Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | Not-Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | Not-Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | Affected |
| SUSE Linux Enterprise High Performance Computing 15-ESPOS | Not-Affected |
| SUSE Linux Enterprise High Performance Computing 15-LTSS | Not-Affected |
| SUSE Linux Enterprise Micro 5.0 | Affected |
| SUSE Linux Enterprise Micro 5.1 | Affected |
| SUSE Linux Enterprise Micro 5.2 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 | Not-Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | Not-Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | Affected |
| SUSE Linux Enterprise Point of Sale 11 SP3 | Not-Affected |
| SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT | Not-Affected |
| SUSE Linux Enterprise Real Time 15 SP2 | Affected |
| SUSE Linux Enterprise Real Time 15 SP3 | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | Affected |
| SUSE Linux Enterprise Server 11 SP3 | Not-Affected |
| SUSE Linux Enterprise Server 11 SP3-LTSS | Not-Affected |
| SUSE Linux Enterprise Server 11 SP4 | Not-Affected |
| SUSE Linux Enterprise Server 11 SP4-LTSS | Not-Affected |
| SUSE Linux Enterprise Server 12 | Not-Affected |
| SUSE Linux Enterprise Server 12 SP1 | Not-Affected |
| SUSE Linux Enterprise Server 12 SP1-LTSS | Not-Affected |
| SUSE Linux Enterprise Server 12 SP2 | Not-Affected |
| SUSE Linux Enterprise Server 12 SP2-BCL | Not-Affected |
| SUSE Linux Enterprise Server 12 SP2-ESPOS | Not-Affected |
| SUSE Linux Enterprise Server 12 SP2-LTSS | Not-Affected |
| SUSE Linux Enterprise Server 12 SP3 | Not-Affected |
| SUSE Linux Enterprise Server 12 SP3-BCL | Not-Affected |
| SUSE Linux Enterprise Server 12 SP3-ESPOS | Not-Affected |
| SUSE Linux Enterprise Server 12 SP3-LTSS | Not-Affected |
| SUSE Linux Enterprise Server 12 SP4 | Not-Affected |
| SUSE Linux Enterprise Server 12 SP4-ESPOS | Not-Affected |
| SUSE Linux Enterprise Server 12 SP4-LTSS | Not-Affected |
| SUSE Linux Enterprise Server 12-LTSS | Not-Affected |
| SUSE Linux Enterprise Server 15 | Not-Affected |
| SUSE Linux Enterprise Server 15 SP1 | Not-Affected |
| SUSE Linux Enterprise Server 15 SP1-BCL | Not-Affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | Not-Affected |
| SUSE Linux Enterprise Server 15 SP2 | Affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | Affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | Affected |
| SUSE Linux Enterprise Server 15 SP3 | Affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | Affected |
| SUSE Linux Enterprise Server 15-LTSS | Not-Affected |
| SUSE Linux Enterprise Server for Raspberry Pi 12 SP2 | Not-Affected |
| SUSE Linux Enterprise Server for SAP Applications 11 SP3 | Not-Affected |
| SUSE Linux Enterprise Server for SAP Applications 11 SP4 | Not-Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 | Not-Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP1 | Not-Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP2 | Not-Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | Not-Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | Not-Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 | Not-Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | Not-Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | Affected |
| SUSE Linux Enterprise Software Development Kit 11 SP3 | Not-Affected |
| SUSE Linux Enterprise Software Development Kit 11 SP4 | Not-Affected |
| SUSE Linux Enterprise Software Development Kit 12 | Not-Affected |
| SUSE Linux Enterprise Software Development Kit 12 SP1 | Not-Affected |
| SUSE Linux Enterprise Software Development Kit 12 SP2 | Not-Affected |
| SUSE Linux Enterprise Software Development Kit 12 SP3 | Not-Affected |
| SUSE Linux Enterprise Software Development Kit 12 SP4 | Not-Affected |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | Not-Affected |
| SUSE Manager Proxy 4.0 | Not-Affected |
| SUSE Manager Proxy 4.1 | Affected |
| SUSE Manager Proxy 4.2 | Affected |
| SUSE Manager Retail Branch Server 4.0 | Not-Affected |
| SUSE Manager Retail Branch Server 4.1 | Affected |
| SUSE Manager Retail Branch Server 4.2 | Affected |
| SUSE Manager Server 4.0 | Not-Affected |
| SUSE Manager Server 4.1 | Affected |
| SUSE Manager Server 4.2 | Affected |
| SUSE OpenStack Cloud 7 | Not-Affected |
| SUSE OpenStack Cloud 8 | Not-Affected |
| SUSE OpenStack Cloud 9 | Not-Affected |
| SUSE OpenStack Cloud Crowbar 8 | Not-Affected |
| SUSE OpenStack Cloud Crowbar 9 | Not-Affected |
| openSUSE Leap 15.3 | Affected |
| openSUSE Leap 15.4 | Affected |
| openSUSE Leap 15.5 | Affected |
| openSUSE Leap 15.6 | Affected |
| openSUSE Leap Micro 5.2 | Affected |
| openSUSE Leap Micro 5.3 | Affected |
| openSUSE Leap Micro 5.4 | Affected |
| openSUSE Leap Micro 5.5 | Affected |
| SLES-CHOST-BYOS-Aliyun | Affected |
| SLES-CHOST-BYOS-Azure | Affected |
| SLES-CHOST-BYOS-EC2 | Affected |
| SLES-CHOST-BYOS-GCE | Affected |
| SLES-CHOST-BYOS-GDC | Affected |
| SLES-CHOST-BYOS-SAP-CCloud | Affected |
| bci/gcc bci/golang bci/golang:1.23 bci/golang:1.23-openssl bci/kiwi bci/node:18 bci/node:22 bci/openjdk bci/openjdk:11 bci/openjdk:17 bci/python bci/python:3 bci/ruby bci/spack:0.23 containers/open-webui-mcpo:0 containers/open-webui-pipelines:0 containers/open-webui:0 containers/python:3.11 containers/python:3.9 kiwi-templates-Minimal kiwi-templates-Minimal-Cloud-sap kiwi-templates-Minimal-MS-HyperV-sap kiwi-templates-Minimal-VMware-sap kiwi-templates-Minimal-kvm-and-xen-sap rancher/seedimage-builder rancher/seedimage-builder/5.3 suse/hpc/warewulf4-x86_64/sle-hpc-node suse/manager/4.3/proxy-httpd suse/manager/4.3/proxy-salt-broker suse/manager/5.0/x86_64/proxy-httpd suse/manager/5.0/x86_64/proxy-salt-broker suse/manager/5.0/x86_64/server suse/multi-linux-manager/5.1/x86_64/proxy-httpd suse/multi-linux-manager/5.1/x86_64/proxy-salt-broker suse/multi-linux-manager/5.1/x86_64/server suse/multi-linux-manager/5.2/x86_64/monitoring-alertmanager suse/multi-linux-manager/5.2/x86_64/monitoring-blackbox_exporter suse/multi-linux-manager/5.2/x86_64/monitoring-prometheus suse/multi-linux-manager/5.2/x86_64/proxy-httpd suse/multi-linux-manager/5.2/x86_64/server suse/sle-micro-rancher/5.2 suse/sle-micro-rancher/5.3 suse/sle-micro-rancher/5.4 suse/sle-micro/5.1/toolbox suse/sle-micro/5.2/toolbox suse/sle-micro/5.3/toolbox suse/sle-micro/5.4/toolbox suse/sle-micro/5.5/toolbox suse/sle-micro/base-5.5 suse/sle15:15.3 suse/sle15:15.4 suse/sle15:15.5 suse/sles/15.3/libguestfs-tools:0.45.0 suse/sles/15.4/libguestfs-tools:0.49.0 suse/sles/15.4/virt-handler:0.49.0 suse/sles/15.5/cdi-cloner:1.55.0 suse/sles/15.5/cdi-importer:1.55.0 suse/sles/15.5/cdi-uploadserver:1.55.0 suse/sles/15.5/libguestfs-tools:0.58.0 suse/sles/15.5/virt-handler:0.58.0 suse/sles/15.5/virt-launcher:0.58.0 suse/sles/15.6/cdi-cloner:1.58.0 suse/sles/15.6/cdi-importer:1.58.0 suse/sles/15.6/cdi-uploadserver:1.58.0 suse/sles/15.6/libguestfs-tools:1.1.1 suse/sles/15.6/virt-handler:1.1.1 suse/sles/15.6/virt-launcher:1.1.1 suse/sles/15.7/cdi-cloner:1.58.0 suse/sles/15.7/cdi-importer:1.58.0 suse/sles/15.7/cdi-uploadserver:1.58.0 suse/sles/15.7/libguestfs-tools:1.5.0 suse/sles/15.7/virt-handler:1.5.0 suse/sles/15.7/virt-launcher:1.5.0 suse/sles/16.0/toolbox | Affected |
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-41510