CVE record · CVE-2026-4873

connection reuse ignores TLS requirement

CVSS 5.9 MediumEPSS 0.0033 · 26th percentile

Published by the CVE Program (CNA: curl) at 13 May 2026, 08:27 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 7.20.0 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 ec3bb8f727405642a471b4b1b9eb0118fc003104 to before 507e7be573b0a76fca597b75ff7cb27a66e7d865 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 120 more Other versions: unaffected

Identifiers: CVE-2026-4873
CNA: curl
Weakness (CWE): CWE-319
Tags: curl
Weak cryptography or TLS
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:H/I:N/A:N	ADP (CISA-ADP)

CISA KEV Not listed.
EPSS 0.0033, the 26th 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.