CVE-2025-40908

Public Exploit
YAML-LibYAML prior to 0.903.0 for Perl uses 2-args open, allowing existing files to be modified

Description

YAML-LibYAML prior to 0.903.0 for Perl uses 2-args open, allowing existing files to be modified

Category

9.1
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.03%
Affected: TINITA YAML::LibYAML
Published at:
Updated at:

References

Link Tags
https://github.com/ingydotnet/yaml-libyaml-pm/issues/120 exploit issue tracking
https://github.com/ingydotnet/yaml-libyaml-pm/pull/121 patch issue tracking
https://github.com/ingydotnet/yaml-libyaml-pm/pull/122 patch issue tracking

Frequently Asked Questions

What is the severity of CVE-2025-40908?
CVE-2025-40908 has been scored as a critical severity vulnerability.
How to fix CVE-2025-40908?
To fix CVE-2025-40908, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-40908 being actively exploited in the wild?
It is possible that CVE-2025-40908 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-40908?
CVE-2025-40908 affects TINITA YAML::LibYAML.
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