CVE record · CVE-2026-55953

TLS 1.2 and DTLS client accepts unoffered anonymous cipher suite, bypassing server authentication

CVSS 9.1 CriticalCriticalEPSS 0.0023 · 14th percentile

Critical, because:

CVSS score 9.1: 9.0 or more.

Published by the CVE Program (CNA: EEF) at 27 Jul 2026, 15:21 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
Erlang	OTP Package name: otp pkg:software-id/erlang.org/otp	unknown before 17.0 otp affected 17.0 to before 27.3.4.15 otp affected 28.0 to before 28.5.0.4 otp affected 29.0 to before 29.0.4 otp Other versions: unaffected
Erlang	OTP Package name: ssl pkg:otp/ssl?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Ferlang%2Fotp.git	unknown before 5.3.4 otp affected 5.3.4 to before 11.2.12.11 otp affected 11.3 to before 11.6.0.4 otp affected 11.7 to before 11.7.4 otp Other versions: unaffected
Erlang	OTP Package name: erlang/otp https://github.com pkg:github/erlang/otp	affected 84adefa331c4159d432d22840663c38f155cd4c1 to before * git Other versions: unaffected

Identifiers: CVE-2026-55953
CNA: EEF
Weakness (CWE): CWE-757
Tags: Erlang OTP
CWE-757
Published: 27 Jul 2026
Updated: 8 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
9.1	Critical	4.0	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N	CNA (EEF)

CISA KEV Not listed.
EPSS 0.0023, the 14th 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 27 Jul 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/erlang/otp/security/advisories/GHSA-c6cw-pr89-w882 vendor-advisoryrelated
cna.erlef.org/cves/CVE-2026-55953.html related
osv.dev/vulnerability/EEF-CVE-2026-55953 related
www.erlang.org/doc/system/versions.html#order-of-versions version-scheme
github.com/erlang/otp/commit/064e236414614f9085cbbbd6eacf0e43c02d1b4b patch
github.com/erlang/otp/commit/0a82596d425abe43dc2e0b3d74aa1557ef74051c patch
github.com/erlang/otp/commit/e6ff938116b2872bccc478af7fefb56627285b77 patch

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.