# CVE-2020-16156: perl-modules-5.26: CPAN 2.28 allows Signature Verification Bypass. CVE-2020-16156 is fixed in 10 products on 1 platform, first by libperl5.26 5.26.1-6ubuntu0.6, released December 13, 2021. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2020-16156 - Priority: High - CVSS: 7.8 (Medium) - EPSS: 0.0086 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Dec 13, 2021 ## Description CPAN 2.28 allows Signature Verification Bypass. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | libperl5.26 Ubuntu 18.04.6 LTS (bionic) | 5.26.1-6ubuntu0.6 | [libperl5.26 5.26.1-6ubuntu0.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libperl5.26-5.26.1-6ubuntu0.6.md) | Dec 13, 2021 | | Linux | libperl5.30 Ubuntu 20.04 LTS (focal) | 5.30.0-9ubuntu0.3 | [libperl5.30 5.30.0-9ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libperl5.30-5.30.0-9ubuntu0.3.md) | Dec 13, 2021 | | Linux | libperl5.34 Ubuntu 22.04.1 LTS (jammy) | 5.34.0-3ubuntu1.1 | [libperl5.34 5.34.0-3ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libperl5.34-5.34.0-3ubuntu1.1.md) | Dec 13, 2021 | | Linux | perl Debian 11.6 (bullseye) | 5.32.1-4+deb11u4 | [DLA-3926-1](https://patchblox.com/security/data/fix/linux/dla-3926-1.md) | Oct 21, 2024 | | Linux | perl Debian 12.15 (bookworm) | 5.36.0-4 | [DEBIAN-CVE-2020-16156](https://patchblox.com/security/data/fix/linux/debian-cve-2020-16156.md) | Dec 13, 2021 | | Linux | perl Debian 13.5 (trixie) | 5.36.0-4 | [DEBIAN-CVE-2020-16156](https://patchblox.com/security/data/fix/linux/debian-cve-2020-16156.md) | Dec 13, 2021 | | Linux | perl Debian 14 | 5.36.0-4 | [DEBIAN-CVE-2020-16156](https://patchblox.com/security/data/fix/linux/debian-cve-2020-16156.md) | Dec 13, 2021 | | Linux | perl Ubuntu 18.04.6 LTS (bionic) | 5.26.1-6ubuntu0.6 | [perl 5.26.1-6ubuntu0.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-perl-5.26.1-6ubuntu0.6.md) | Dec 13, 2021 | | Linux | perl Ubuntu 20.04 LTS (focal) | 5.30.0-9ubuntu0.3 | [perl 5.30.0-9ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-perl-5.30.0-9ubuntu0.3.md) | Dec 13, 2021 | | Linux | perl Ubuntu 22.04.1 LTS (jammy) | 5.34.0-3ubuntu1.1 | [perl 5.34.0-3ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-perl-5.34.0-3ubuntu1.1.md) | Dec 13, 2021 | | Linux | perl-CPAN RHEL 8 | 0:2.18-402.el8_10 | [RHSA-2025:8432](https://patchblox.com/security/data/fix/linux/rhsa-2025-8432.md) | Jun 3, 2025 | | Linux | perl-CPAN almalinux 8 | 2.18-402.el8_10 | [ALSA-2025:8432](https://patchblox.com/security/data/fix/linux/alsa-2025-8432.md) | Jun 3, 2025 | | Linux | perl-CPAN ol 8 | 0:2.18-402.el8_10 | [ELSA-2025-8432](https://patchblox.com/security/data/fix/linux/elsa-2025-8432.md) | Jun 3, 2025 | | Linux | perl-CPAN rocky 8 | 0:2.18-402.el8_10 | [RLSA-2025:8432](https://patchblox.com/security/data/fix/linux/rlsa-2025-8432.md) | Jul 29, 2025 | | Linux | perl-base Ubuntu 18.04.6 LTS (bionic) | 5.26.1-6ubuntu0.6 | [perl-base 5.26.1-6ubuntu0.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-perl-base-5.26.1-6ubuntu0.6.md) | Dec 13, 2021 | | Linux | perl-base Ubuntu 20.04 LTS (focal) | 5.30.0-9ubuntu0.3 | [perl-base 5.30.0-9ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-perl-base-5.30.0-9ubuntu0.3.md) | Dec 13, 2021 | | Linux | perl-base Ubuntu 22.04.1 LTS (jammy) | 5.34.0-3ubuntu1.1 | [perl-base 5.34.0-3ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-perl-base-5.34.0-3ubuntu1.1.md) | Dec 13, 2021 | | Linux | perl-debug Ubuntu 18.04.6 LTS (bionic) | 5.26.1-6ubuntu0.6 | [perl-debug 5.26.1-6ubuntu0.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-perl-debug-5.26.1-6ubuntu0.6.md) | Dec 13, 2021 | | Linux | perl-debug Ubuntu 20.04 LTS (focal) | 5.30.0-9ubuntu0.3 | [perl-debug 5.30.0-9ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-perl-debug-5.30.0-9ubuntu0.3.md) | Dec 13, 2021 | | Linux | perl-debug Ubuntu 22.04.1 LTS (jammy) | 5.34.0-3ubuntu1.1 | [perl-debug 5.34.0-3ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-perl-debug-5.34.0-3ubuntu1.1.md) | Dec 13, 2021 | | Linux | perl-modules-5.26 Ubuntu 18.04.6 LTS (bionic) | 5.26.1-6ubuntu0.6 | [perl-modules-5.26 5.26.1-6ubuntu0.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-perl-modules-5.26-5.26.1-6ubuntu0.6.md) | Dec 13, 2021 | | Linux | perl-modules-5.30 Ubuntu 20.04 LTS (focal) | 5.30.0-9ubuntu0.3 | [perl-modules-5.30 5.30.0-9ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-perl-modules-5.30-5.30.0-9ubuntu0.3.md) | Dec 13, 2021 | | Linux | perl-modules-5.34 Ubuntu 22.04.1 LTS (jammy) | 5.34.0-3ubuntu1.1 | [perl-modules-5.34 5.34.0-3ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-perl-modules-5.34-5.34.0-3ubuntu1.1.md) | Dec 13, 2021 | --- Data as of 2026-11-08T06:59:42Z UTC. 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