CVE-2026-7009

MEDIUM

curl 8.17.0-8.20.0 - Improper Certificate Validation via OCSP Stapling

Title source: llm

Description

When curl is told to use the Certificate Status Request TLS extension, often referred to as *OCSP stapling*, to verify that the server certificate is valid, it fails to detect OCSP problems and instead wrongly consider the response as fine.

References (4)

Core 4

Core References

json

https://curl.se/docs/CVE-2026-7009.json

www

https://curl.se/docs/CVE-2026-7009.html

issue

https://hackerone.com/reports/3694390

Mailing List

http://www.openwall.com/lists/oss-security/2026/04/29/12

Scores

CVSS v3 5.3

EPSS 0.0001

EPSS Percentile 2.0%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact partial

Details

CWE

CWE-295

Status published

Products (4)

curl/curl 8.17.0

curl/curl 8.18.0

curl/curl 8.19.0

haxx/curl 8.17.0 - 8.20.0

Published May 13, 2026

Tracked Since May 13, 2026