Skip to main content

libcurl EUVDEUVD-2026-72168

| CVE-2026-80230 HIGH
Improper Certificate Validation (CWE-295)
7.5
CVSS 3.1 · Vendor
Share

Severity by source

Vendor (CNA) PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vuln.today AI
7.4 HIGH

Pinning bypass enables MITM yielding C:H/I:H with no availability impact; AC:H because the non-default dual-verification-disable configuration is required and outside the attacker's control.

3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
4.0 AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
SUSE
3.1 MEDIUM
AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

Primary rating from Vendor (CNA).

CVSS VectorVendor

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

6
Analysis Updated
Sep 08, 2026 - 19:48 vuln.today
v3 (cvss_changed)
Analysis Updated
Sep 08, 2026 - 19:43 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Sep 08, 2026 - 19:23 vuln.today
cvss_changed
CVSS changed
Sep 08, 2026 - 19:23 NVD
7.5 (HIGH)
Analysis Generated
Sep 02, 2026 - 12:19 vuln.today
CVE Published
Sep 02, 2026 - 10:57 oss-security
CRITICAL

Description PRE-NVD

Disclosed via oss-security. NVD scoring and full description are pending.

AnalysisAI

Public key pinning enforcement in libcurl (versions 7.45.0 through at least 8.21.0) is silently bypassed when CURLOPT_PINNEDPUBLICKEY is combined with CURLOPT_SSL_VERIFYPEER=0 and CURLOPT_SSL_VERIFYHOST=0 - the exact configuration adopted by applications that rely on pinning as their sole TLS trust anchor after disabling standard certificate chain validation. When a server presents no certificate at all, libcurl's pin-check code path is never reached and the connection succeeds, enabling a network-positioned attacker to conduct MITM attacks against applications that believed pinning would protect them. …

Unlock full vulnerability intelligence

  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
  • Personal watchlist & email alerts

Free forever · No credit card required

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
technique details hidden
Exploit
technique details hidden
Execution
technique details hidden
Persist
technique details hidden
Impact
technique details hidden

Vulnerability AssessmentAI

Exploitation Exploitation requires three simultaneous non-default conditions: (1) the target application must have explicitly configured CURLOPT_PINNEDPUBLICKEY with a pinned key hash; (2) the same application must have set CURLOPT_SSL_VERIFYPEER=0, disabling certificate chain validation (the secure default is 1); and (3) the same application must have set CURLOPT_SSL_VERIFYHOST=0, disabling hostname verification (the secure default is 2). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The real-world impact differs substantially from what the provided CVSS vector implies. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Consult the primary curl advisory at https://curl.se/docs/CVE-2026-80230.html for the confirmed patched version. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, inventory all systems running libcurl versions 7.45.0-8.21.0 and identify which applications use CURLOPT_PINNEDPUBLICKEY combined with both CURLOPT_SSL_VERIFYPEER=0 and CURLOPT_SSL_VERIFYHOST=0. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

More in Curl

View all
CVE-2013-0249 HIGH POC
7.5 Mar 08

Stack-based buffer overflow in the Curl_sasl_create_digest_md5_message function in lib/curl_sasl.c in curl and libcurl 7

CVE-2015-3145 HIGH
7.5 Apr 24

The sanitize_cookie_path function in cURL and libcurl 7.31.0 through 7.41.0 does not properly calculate an index, which

CVE-2022-32221 CRITICAL POC
9.8 Dec 05

When doing HTTP(S) transfers, libcurl might erroneously use the read callback (`CURLOPT_READFUNCTION`) to ask for data t

CVE-2022-32207 CRITICAL POC
9.8 Jul 07

When curl < 7.84.0 saves cookies, alt-svc and hsts data to local files, it makes the operation atomic by finalizing the

CVE-2018-0500 CRITICAL POC
9.8 Jul 11

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

CVE-2025-9086 HIGH POC
7.5 Sep 12

1. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack co

CVE-2023-23914 CRITICAL POC
9.1 Feb 23

A cleartext transmission of sensitive information vulnerability exists in curl <v7.88.0 that could cause HSTS functional

CVE-2023-27534 HIGH POC
8.8 Mar 30

A path traversal vulnerability exists in curl <8.0.0 SFTP implementation causes the tilde (~) character to be wrongly re

CVE-2023-27533 HIGH POC
8.8 Mar 30

A vulnerability in input validation exists in curl <8.0 during communication using the TELNET protocol may allow an atta

CVE-2026-3784 MEDIUM POC
6.5 Mar 11

curl's HTTP proxy connection reuse mechanism fails to validate credential changes, allowing an attacker to intercept or

CVE-2025-0665 HIGH POC
7.0 Feb 05

A double-close vulnerability exists in libcurl when tearing down connection channels after threaded name resolution, cau

CVE-2022-22576 HIGH POC
8.1 May 26

An improper authentication vulnerability exists in curl 7.33.0 to and including 7.82.0 which might allow reuse OAUTH2-au

Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
Container bci/bci-sle15-kernel-module-devel:latest Container bci/rust:1.97 Container bci/rust:latest Container private-registry/1.2/harbor-trivy-adapter:1.2.1-1.99 Container private-registry/harbor-trivy-adapter:1.1.3-2.117 Container suse/kea:2.6-79.22 Container suse/kiosk/firefox-esr:140.14-75.25 Container suse/postgres:16 Container suse/postgres:16.15 Container suse/postgres:17 Container suse/postgres:17.11 Container suse/postgres:latest Container suse/rmt-server:latest Affected
Container bci/golang:1.25.14-3.72.4 Container bci/golang:1.25.14-openssl-90.8 Container bci/golang:1.26.7-2.73.4 Container bci/golang:1.26.7-openssl-90.8 Container bci/node:22 Container bci/openjdk:17 Container bci/openjdk:21 Container bci/openjdk:latest Container bci/python:3 Container bci/python:latest Container bci/ruby:2 Container bci/ruby:latest Container suse/hpc/warewulf4-x86_64/sle-hpc-node:15.7.20.8.154 Container suse/sle15:latest Affected
Container suse/ltss/sle15.6/sle15:15.6-5.89 Affected
Container suse/sl-micro/6.0/baremetal-os-container:latest Container suse/sl-micro/6.0/kvm-os-container:latest Container suse/sl-micro/6.0/rt-os-container:latest Affected
Container suse/sl-micro/6.0/base-os-container:latest Image SLE-Micro Image SLE-Micro-Azure Image SLE-Micro-BYOS Image SLE-Micro-BYOS-Azure Image SLE-Micro-BYOS-EC2 Image SLE-Micro-BYOS-GCE Image SLE-Micro-EC2 Image SLE-Micro-GCE Affected

Share

EUVD-2026-72168 vulnerability details – vuln.today

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy