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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2025-6499
• vstakhov/libucl#319
• https://github.com/user-attachments/files/19825399/libucl_crash.txt
• https://vuldb.com/?ctiid.313615
• https://vuldb.com/?id.313615
• https://vuldb.com/?submit.601011