CVE-2026-42791: Erlang OTP

OCSP responder certificate validity period not checked in public_key

CVSS 6.3 MediumEPSS 0.0032 · 24th percentile

Published by the CVE Program (CNA: EEF) at 27 May 2026, 12:23 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: public_key pkg:otp/public_key?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git	affected 1.16 to before * otp Other versions: unknown
Erlang	OTP Package name: erlang/otp https://github.com pkg:github/erlang/otp	affected 27.0 to before * otp affected 2b1a742c651b90f8a7a1fb2ddde73f29915ea376 to before * git Other versions: unknown

Identifiers

CVE-2026-42791

CNA

EEF

Weakness (CWE)

CWE-295 · CWE-672

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
6.3	Medium	4.0	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N	CNA (EEF)

CISA KEV Not listed.
EPSS 0.0032, the 24th 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 May 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/erlang/otp/security/advisories/GHSA-cjxj-wj6x-3fff vendor-advisoryrelated
cna.erlef.org/cves/CVE-2026-42791.html related
osv.dev/vulnerability/EEF-CVE-2026-42791 related
www.erlang.org/doc/system/versions.html#order-of-versions version-scheme
github.com/erlang/otp/commit/7995f1fdaee3da569bb810358ce0f546471d169b patch
github.com/erlang/otp/commit/b3870e02405c709a872b01ba6086065620cdfe76 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.