Vulnerability in Erlang Erlang\/otp
CVE-2026-42791
Improper Certificate Validation vulnerability in Erlang OTP public_key (pubkey_ocsp module) allows forged OCSP responses signed with an expired responder certificate to be accepted as valid. OCSP response verification in pubkey_ocsp:verif…
Vulnerability class: Improper Certificate Validation
EPSS: 0.001 (16.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Erlang Erlang\/otp
- Erlang Otp — versions 1.16, 27.0, 2b1a742c651b90f8a7a1fb2ddde73f29915ea376
Weakness classification (CWE)
References
- 6b3ad84c-e1a6-4bf7-a703-f496b71e49db (related, vendor-advisory, Mitigation, Vendor Advisory)
- 6b3ad84c-e1a6-4bf7-a703-f496b71e49db (related, Third Party Advisory)
- 6b3ad84c-e1a6-4bf7-a703-f496b71e49db (related, Third Party Advisory)
- 6b3ad84c-e1a6-4bf7-a703-f496b71e49db (Product, x_version-scheme)
- 6b3ad84c-e1a6-4bf7-a703-f496b71e49db (Patch, patch)
- 6b3ad84c-e1a6-4bf7-a703-f496b71e49db (Patch, patch)
Frequently asked questions
- What is CVE-2026-42791?
- CVE-2026-42791 is a low-severity vulnerability in Erlang Erlang\/otp, classified under Improper Certificate Validation. CVSS score: 3.7/10. Published 2026-05-27.
- How severe is CVE-2026-42791?
- Low severity. CVSS v3 base score is 3.7 out of 10.