GHSA-88c6-6jfq-mm4q
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Network vector as curl operates over network; AC:H because wrong-reuse requires specific multi-service session conditions; C:L/I:L for potential context bleed, no availability impact.
AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Primary rating from Vendor (CNA).
CVSS VectorVendor
Lifecycle Timeline
2Description PRE-NVD
AnalysisAI
Wrong connection reuse across different services in curl/libcurl up to 8.20.0 allows curl's connection pool to incorrectly match and reuse an existing connection when the target service differs from the one originally used to establish that connection. This is part of a coordinated batch of 19 CVEs fixed in curl 8.21.0, released June 24, 2026. No public exploit or active exploitation has been identified; the curl project rates this LOW severity, consistent with limited real-world attack surface requiring specific multi-service usage patterns.
Technical ContextAI
curl maintains an internal connection pool (multi-handle connection cache) to reuse established TCP/TLS connections for subsequent transfers to the same host, improving performance. CVE-2026-8458 represents a logic flaw in the connection pool matching algorithm: when an application issues requests to different services - distinguished by protocol, port, or service type - curl incorrectly identifies a pooled connection established for one service as eligible for reuse by a transfer targeting a different service. Related sibling CVEs in the same release (CVE-2026-8286 for wrong STARTTLS reuse, CVE-2026-8932 for incomplete mTLS config matching in conn reuse) confirm a pattern of curl connection-cache selection bugs in the 8.17-8.20 era. The likely CWE class is CWE-706 (Use of Incorrectly-Resolved Name or Reference) or closely related state-management defects in pool key comparison. The flaw affects libcurl consumers; command-line tool impact depends on multi-transfer usage patterns.
RemediationAI
Upgrade curl and libcurl to version 8.21.0, released June 24, 2026, which resolves CVE-2026-8458 alongside 18 other security issues patched in the same coordinated release. The curl project advisory at https://curl.se/docs/CVE-2026-8458.html and the oss-security announcement at https://seclists.org/oss-sec/2026/q2/1012 are the authoritative references. For applications that cannot immediately upgrade, a compensating control is to avoid connection pool reuse across different service types by using separate easy handles or resetting the multi-handle session between transfers to distinct services - this eliminates the incorrect reuse condition at the cost of losing connection-reuse performance benefits. Applying the upstream patch and rebuilding libcurl from source is also viable if a packaged 8.21.0 is not yet available for the target platform.
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 technique Information Disclosure
View allVendor StatusVendor
SUSE
Severity: Moderate| 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 | Affected |
| SUSE Linux Enterprise Server 12 SP5-LTSS | Affected |
| SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security | 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 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | 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 | Affected |
| SUSE Enterprise Storage 6 | 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 | Affected |
| SUSE Linux Enterprise Desktop 15 | Affected |
| SUSE Linux Enterprise Desktop 15 SP1 | 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 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | 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 | Affected |
| SUSE Linux Enterprise High Performance Computing 15-LTSS | 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 | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | 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 | Affected |
| SUSE Linux Enterprise Server 12 SP4-ESPOS | Affected |
| SUSE Linux Enterprise Server 12 SP4-LTSS | Affected |
| SUSE Linux Enterprise Server 12-LTSS | Not-Affected |
| SUSE Linux Enterprise Server 15 | Affected |
| SUSE Linux Enterprise Server 15 SP1 | Affected |
| SUSE Linux Enterprise Server 15 SP1-BCL | Affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | 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 | 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 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | 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 | Affected |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | Affected |
| SUSE Manager Proxy 4.0 | Affected |
| SUSE Manager Proxy 4.1 | Affected |
| SUSE Manager Proxy 4.2 | Affected |
| SUSE Manager Retail Branch Server 4.0 | Affected |
| SUSE Manager Retail Branch Server 4.1 | Affected |
| SUSE Manager Retail Branch Server 4.2 | Affected |
| SUSE Manager Server 4.0 | 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 | Affected |
| SUSE OpenStack Cloud Crowbar 8 | Not-Affected |
| SUSE OpenStack Cloud Crowbar 9 | 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-2026-41504