CVE-2025-6499: Vstakhov Libucl

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

A vulnerability classified as problematic was found in vstakhov libucl up to 0.9.2. Affected by this vulnerability is the function ucl_parse_multiline_string of the file src/ucl_parser.c. The manipulation leads to heap-based buffer overflow. The attack needs to be approached locally. The exploit has been disclosed to the public and may be used.

Affected products

• Vstakhov Libucl: up to and including 0.9.2

Published 2025-06-23. Last modified 2026-06-17.