CVE-2025-40908 is a critical vulnerability affecting ingydotnet yaml_libyaml, specifically Perl's YAML-LibYAML prior to version 0.903.0. The flaw stems from its use of a 2-argument open function, which allows an unauthenticated attacker to modify existing files remotely with low attack complexity. This vulnerability carries a CVSS score of 9.1 (CRITICAL), indicating high impact on confidentiality and integrity. Despite its severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 0.903.0CPE matchmatch criteria | cpe:2.3:a:ingydotnet:yaml-libyaml:*:*:*:*:*: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:N
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.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.