CVE-2022-37026 — In Erlang/OTP before 23

In Erlang/OTP before 23.3.4.15, 24.x before 24.3.4.2, and 25.x before 25.0.2, there is a Client Authentication Bypass in certain client-certification situations for SSL, TLS, and DTLS.

01What is this vulnerability?

In Erlang/OTP before 23.3.4.15, 24.x before 24.3.4.2, and 25.x before 25.0.2, there is a Client Authentication Bypass in certain client-certification situations for SSL, TLS, and DTLS.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2022-09-21T00:00:00.000Z
• Last modified: 2025-05-27T18:19:43.782Z

09References

• github.com — https://github.com/erlang/otp/compare/OTP-23.3.4.14...OTP-23.3.4.15
• erlangforums.com — https://erlangforums.com/c/erlang-news-announcements/91
• erlangforums.com — https://erlangforums.com/t/otp-25-1-released/1854
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2023/07/msg00012.html