CVE record · CVE-2026-6253

proxy credentials leak over redirect-to proxy

CVSS 5.9 MediumEPSS 0.0072 · 54th percentile

Published by the CVE Program (CNA: curl) at 13 May 2026, 08:28 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
curl	curl	affected 7.14.1 to before 8.14.2 semver affected 8.15.0 to before 8.16.1 semver affected 8.17.0 to before 8.20.0 semver Other versions: unaffected
curl	curl	affected 3b60bb725913ce7339aefef0a14b12df4c24db60 to before 188c2f166a20fa97c2325b2da7d0e5cecc13725f git Other versions: unaffected
curl	curl	affected 8.19.0 affected 8.18.0 affected 8.17.0 affected 8.16.0 affected 8.15.0 affected 8.14.1 affected 8.14.0 affected 8.13.0 affected 8.12.1 affected 8.12.0 affected 8.11.1 affected 8.11.0 and 145 more Other versions: unaffected

Identifiers: CVE-2026-6253
CNA: curl
Weakness (CWE): CWE-522
Tags: curl
Hard-coded credentials
Published: 13 May 2026
Updated: 15 Sept 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.9	Medium	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H	ADP (CISA-ADP)

CISA KEV Not listed.
EPSS 0.0072, the 54th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 13 May 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.