What is CVE-2024-13939?

CVE-2024-13939 is a high-severity vulnerability in Fractal String\, classified under CWE-208. CVSS score: 7.5/10. Published 2025-03-28.

How severe is CVE-2024-13939?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Fractal String\

CVE-2024-13939

String::Compare::ConstantTime for Perl through 0.321 is vulnerable to timing attacks that allow an attacker to guess the length of a secret string. As stated in the documentation: "If the lengths of the strings are different, because equa…

EPSS: 0.003 (26.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Fractal String\ — versions \
Fractal String::compare::constanttime — versions 0

Weakness classification (CWE)

CWE-208
CWE-203 — Observable Discrepancy

References

9b29abf9-4ab0-4765-b253-1875cd9b441e (Technical Description, related)

Frequently asked questions

What is CVE-2024-13939?: CVE-2024-13939 is a high-severity vulnerability in Fractal String\, classified under CWE-208. CVSS score: 7.5/10. Published 2025-03-28.
How severe is CVE-2024-13939?: High severity. CVSS v3 base score is 7.5 out of 10.