7.5

CVE-2026-80231: curl

CVSS: 7.5v3.1HighModified
AliasesALPINE-CVE-2026-80231UBUNTU-CVE-2026-80231CGA-8g64-9242-qg4m
Published 06-09-2026Last modified 15-09-2026
Open JSON

Vulnerability summary

CVE-2026-80231 is a high (CVSS 7.5) vulnerability in curl. EPSS estimates a 0.90% chance of exploitation in the next 30 days, higher than 59.1% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.90%
0%100%
Low · -0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 2
MGASA-2026-0515RHSA-2026:63161

Timeline

  1. 06-09-2026
    PublishedVulnerability first disclosed.
  2. 15-09-2026
    Last modifiedVulnerability information updated.

Description

A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup for a given hostname even when using a different Native CA Store setting (`CURLSSLOPT_NATIVE_CA`) than when the connection was created.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.90%

Chance of exploitation in the next 30 days

Percentile

59%

Versus all other CVEs

30-day change

-0.04 pp

From 0.94% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.90%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (hackerone.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Chainguard2 products
  • curl< 8.22.0-r0
  • libcurl4All versions (No fix recorded)
Wolfi2 products
  • curl< 8.22.0-r0
  • libcurl4All versions (No fix recorded)
Alpine1 product
  • curl≥ 7.71.0, < 8.22.0-r0
Curl1 product
  • curl≥ 7.71.0, < 8.14.2 | ≥ 8.15.0, < 8.16.1 | ≥ 8.17.0, < 8.20.1 | ≥ 8.21.0, < 8.22.0 | ≥ 148534db57dda611cf8516e92e4d6e35fc1e5074, < 7be1e70cb6bcd83e130ecfe8cb91b6a7dcdeff42 | 8.21.0 | 8.20.0 | 8.19.0 | 8.18.0 | 8.17.0 | 8.16.0 | 8.15.0 | 8.14.1 | 8.14.0 | 8.13.0 | 8.12.1 | 8.12.0 | 8.11.1 | 8.11.0 | 8.10.1 | 8.10.0 | 8.9.1 | 8.9.0 | 8.8.0 | 8.7.1 | 8.7.0 | 8.6.0 | 8.5.0 | 8.4.0 | 8.3.0 | 8.2.1 | 8.2.0 | 8.1.2 | 8.1.1 | 8.1.0 | 8.0.1 | 8.0.0 | 7.88.1 | 7.88.0 | 7.87.0 | 7.86.0 | 7.85.0 | 7.84.0 | 7.83.1 | 7.83.0 | 7.82.0 | 7.81.0 | 7.80.0 | 7.79.1 | 7.79.0 | 7.78.0 | 7.77.0 | 7.76.1 | 7.76.0 | 7.75.0 | 7.74.0 | 7.73.0 | 7.72.0 | 7.71.1 | 7.71.0
Haxx1 product
  • curl≥ 7.71.0, < 8.22.0
Ubuntu1 product
  • curlAll versions (No fix recorded)

6 vendors · 8 products

References

8 links