CVE record · CVE-2026-65634

Superlinear CPU denial of service in Erlang/OTP ASN.1 OBJECT IDENTIFIER decoder

CVSS 8.2 HighEPSS 0.0027 · 18th percentile

Published by the CVE Program (CNA: EEF) at 22 Sept 2026, 08:49 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	affected 17.0 to before * otp Other versions: unknown
Erlang	OTP Package name: asn1 pkg:otp/asn1	affected 3.0 to before * otp Other versions: unknown
Erlang	OTP Package name: erlang/otp https://github.com pkg:github/erlang/otp	affected 84adefa331c4159d432d22840663c38f155cd4c1 to before 0fe2c02fdc06fab1c63be9db1a7456993d20f838 git unaffected 0fe2c02fdc06fab1c63be9db1a7456993d20f838 to before * git Other versions: unknown

Identifiers: CVE-2026-65634
CNA: EEF
Weakness (CWE): CWE-407
Tags: Erlang OTP
Denial of service
Published: 22 Sept 2026
Updated: 24 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
8.2	High	4.0	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	CNA (EEF)

CISA KEV Not listed.
EPSS 0.0027, the 18th 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 22 Sept 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/erlang/otp/security/advisories/GHSA-qghx-23m5-r55m relatedvendor-advisory
cna.erlef.org/cves/CVE-2026-65634.html related
osv.dev/vulnerability/EEF-CVE-2026-65634 related
www.erlang.org/doc/system/versions.html#order-of-versions version-scheme
github.com/erlang/otp/commit/0fe2c02fdc06fab1c63be9db1a7456993d20f838 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.