Vulnerability in Perl
CVE-2025-40909
Perl threads have a working directory race condition where file operations may target unintended paths. If a directory handle is open at thread creation, the process-wide current working directory is temporarily changed in order to clone …
EPSS: 0.004 (28.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Perl — versions 5.13.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (patch)
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (mailing-list, exploit)
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (issue-tracking)
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (related)
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (related)
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (related)
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (related)
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-40909?
- CVE-2025-40909 is a medium-severity vulnerability in Perl, classified under Untrusted Search Path. CVSS score: 5.9/10. Published 2025-05-30.
- How severe is CVE-2025-40909?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2025-40909 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.