The yaml_parser_scan_tag_uri function in scanner.c in LibYAML before 0.1.5 performs an incorrect cast, which allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via crafted tags in a YAML document, which triggers a heap-based buffer overflow.

Affected: npm: libyaml

Versions 0.2.2 and earlier depend on native libyaml version 0.1.5 or earlier. As such, they are affected by a heap-based buffer overflow vulnerability that may result in a crash or arbitrary code execution when parsing YAML tags.

## Recommendation

- Update to version 0.2.3 that includes a version of LibYAML that contains a fix for this issue.

libyaml-0-2-0.1.6-4.8 on GA media

libyaml: heap-based buffer overflow when parsing YAML tags libyaml: heap-based buffer overflow when parsing URLs

Security update for perl-YAML-LibYAML