CVE-2025-71436 PUBLISHED

Raptor RDF Syntax Library from 2.0.15 through 2.0.16 contains a heap-based buffer overflow vulnerability in raptor_new_term_from_counted_literal() caused by truncating language tag length to an unsigned char. Attackers can supply Turtle, TriG, N-Triples or N-Quads documents with language tags of 256 bytes or longer to corrupt heap memory, crash applications, and possibly execute code.

• Pedro Ribeiro (@pedrib1337) from Agile Information Security finder

• https://github.com/dajobe/raptor/issues/83
• https://github.com/dajobe/raptor/commit/361a803a72817ae771db2438277229e6541e1575
• https://github.com/dajobe/raptor/blob/raptor2_2_0_16/src/raptor_term.c#L200-L218
• https://github.com/dajobe/raptor/blob/raptor2_2_0_16/src/raptor_term.c#L270-L287
• VulnCheck Advisory: Raptor RDF Syntax Library 2.0.15 through 2.0.16 Heap Buffer Overflow via Language Tag

• Heap-based Buffer Overflow CWE