CVE-2026-4176 is a critical vulnerability (CVSS 9.8) affecting specific Perl versions (5.9.4 before 5.40.4-RC1, 5.41.0 before 5.42.2-RC1, and 5.43.0 before 5.43.9) due to an outdated, vendored Compress::Raw::Zlib module. This allows unauthenticated attackers to achieve full compromise of confidentiality, integrity, and availability over the network with low attack complexity. Despite a low EPSS score and no known active exploitation, public exploit code, or KEV listing, the vulnerability has garnered some community discussion and media coverage. Organizations utilizing affected Perl versions should prioritize updating to patched versions to mitigate this significant risk.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 5.9.4, < 5.40.4CPE matchmatch criteria | cpe:2.3:a:perl:perl:*:*:*:*:*:*:*:* | ||
>= 5.41.0, < 5.42.2CPE matchmatch criteria | cpe:2.3:a:perl:perl:*:*:*:*:*:*:*:* | ||
>= 5.43.0, < 5.43.9CPE matchmatch criteria | cpe:2.3:a:perl:perl:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.