Description
CPAN 2.28 allows Signature Verification Bypass.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | perl | 5.36.0-4 | — |
| Debian 13 | perl | 5.36.0-4 | — |
| Debian 12 | perl | 5.36.0-4 | — |
| Debian 11 | perl | 5.32.1-4+deb11u4 | DLA-3926-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | perl | 5.34.0-3ubuntu1.1 | USN-5689-1 |
| Ubuntu 20.04 LTS | perl | 5.30.0-9ubuntu0.3 | USN-5689-1 |
| Ubuntu 18.04 LTS | perl | 5.26.1-6ubuntu0.6 | USN-5689-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | perl | 5.22.1-9ubuntu0.9+esm1 | USN-5689-1 |
| Ubuntu Pro 14.04 LTS | perl | 5.18.2-2ubuntu1.7+esm4 | USN-5689-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | perl-CPAN | 2.18-402.el8_10 | RHSA-2025:8432 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | perl-CPAN | 2.18-402.el8_10 | ALSA-2025:8432 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | perl-CPAN | 2.18-402.el8_10 | RLSA-2025:8432 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perl-CPAN | 2.18-402.el8_10 | ELSA-2025-8432 |
Advisories 7
- ALSA-2025:8432 Moderate: perl-CPAN security update AlmaLinux Security Advisories · Oct 29, 2026
- USN-5689-1 perl vulnerability Ubuntu Security Notices (USN) · Jun 29, 2026
- RHSA-2025:8432 Red Hat Security Advisory: perl-CPAN security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- DLA-3926-1 perl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2025:8432 Moderate: perl-CPAN security update Rocky Linux Security Advisories · Jul 29, 2025
- WID-SEC-2023-0138 Oracle Communications Applications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 15, 2025
- ELSA-2025-8432 Moderate: perl-CPAN security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 3, 2025
References
- https://metacpan.org/pod/distribution/CPAN/scripts/cpan
- https://blog.hackeriet.no/cpan-signature-verification-vulnerabilities/
- http://blogs.perl.org/users/neilb/2021/11/addressing-cpan-vulnerabilities-related-to-checksums.html
- FEDORA-2022-21e8372c42 vendor-advisory
- FEDORA-2022-84fd87f7eb vendor-advisory