# CVE-2026-32144: erlang: Improper Certificate Validation vulnerability in Erlang OTP public_key (pubkey_ocsp module) allows OCSP designated-re... CVE-2026-32144 is fixed in 37 products on 1 platform, first by DEBIAN-CVE-2026-32144, released April 7, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-32144 - Priority: High - CVSS: 7.4 (high) - EPSS: 0.0021 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Apr 7, 2026 ## Description Improper Certificate Validation vulnerability in Erlang OTP public_key (pubkey_ocsp module) allows OCSP designated-responder authorization bypass via missing signature verification. The OCSP response validation in public_key:pkix_ocsp_validate/5 does not verify that a CA-designated responder certificate was cryptographically signed by the issuing CA. Instead, it only checks that the responder certificate's issuer name matches the CA's subject name and that the certificate has the OCSPSigning extended key usage. An attacker who can intercept or control OCSP responses can create a self-signed certificate with a matching issuer name and the OCSPSigning EKU, and use it to forge OCSP responses that mark revoked certificates as valid. This affects SSL/TLS clients using OCSP stapling, which may accept connections to servers with revoked certificates, potentially transmitting sensitive data to compromised servers. Applications using the public_key:pkix_ocsp_validate/5 API directly are also affected, with impact depending on usage context. This vulnerability is associated with program files lib/public_key/src/pubkey_ocsp.erl and program routines pubkey_ocsp:is_authorized_responder/3. This issue affects OTP from OTP 27.0 before OTP 28.4.2 and OTP 27.3.4.10, corresponding to public_key from 1.16 before 1.20.3 and 1.17.1.2, and ssl from 11.2 before 11.5.4 and 11.2.12.7. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | erlang Debian 13.5 (trixie) | 1:27.3.4.1+dfsg-1+deb13u3 | [DEBIAN-CVE-2026-32144](https://patchblox.com/security/data/fix/linux/debian-cve-2026-32144.md) | Apr 7, 2026 | | Linux | erlang Debian 14 | 1:27.3.4.10+dfsg-1 | [DEBIAN-CVE-2026-32144](https://patchblox.com/security/data/fix/linux/debian-cve-2026-32144.md) | Apr 7, 2026 | | Linux | erlang Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang opensuse-leap 16.0 | 27.1.3-160000.4.1 | [OPENSUSE-SU-2026:20607-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20607-1.md) | Apr 22, 2026 | | Linux | erlang-asn1 Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-asn1 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-asn1-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-base Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-base 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-base-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-common-test Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-common-test 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-common-test-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-crypto Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-crypto 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-crypto-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-debugger Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-debugger 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-debugger-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-dialyzer Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-dialyzer 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-dialyzer-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-diameter Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-diameter 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-diameter-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-edoc Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-edoc 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-edoc-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-eldap Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-eldap 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-eldap-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-et Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-et 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-et-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-eunit Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-eunit 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-eunit-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-examples Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-examples 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-examples-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-ftp Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-ftp 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-ftp-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-inets Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-inets 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-inets-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-jinterface Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-jinterface 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-jinterface-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-megaco Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-megaco 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-megaco-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-mnesia Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-mnesia 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-mnesia-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-mode Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-mode 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-mode-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-nox Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-nox 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-nox-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-observer Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-observer 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-observer-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-odbc Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-odbc 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-odbc-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-os-mon Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-os-mon 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-os-mon-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-parsetools Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-parsetools 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-parsetools-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-public-key Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-public-key 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-public-key-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-reltool Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-reltool 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-reltool-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-runtime-tools Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-runtime-tools 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-runtime-tools-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-snmp Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-snmp 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-snmp-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-src Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-src 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-src-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-ssh Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-ssh 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-ssh-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-ssl Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-ssl 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-ssl-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-syntax-tools Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-syntax-tools 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-syntax-tools-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-tftp Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-tftp 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-tftp-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-tools Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-tools 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-tools-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-wx Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-wx 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-wx-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-x11 Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-x11 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-x11-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-xmerl Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-xmerl 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-xmerl-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | --- Data as of 2026-11-08T19:12:23Z UTC. 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