What’s Vulnerable › Vulnerabilities

CVE-2025-71436: Raptor RDF Syntax Library 2.0.15 through 2.0.16 Heap Buffer Overflow via Language Tag

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-20 · updated 2026-10-28
• Weakness: CWE-122

Description

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.

Affected products

• librdf Raptor RDF Syntax Library: from 2.0.15 through 2.0.16

References

• 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
• https://github.com/dajobe/raptor/commit/361a803a72817ae771db2438277229e6541e1575
• https://github.com/dajobe/raptor/issues/83
• https://www.vulncheck.com/advisories/raptor-rdf-syntax-library-2.0.15-through-2.0.16-heap-buffer-overflow-via-language-tag
• https://github.com/dajobe/raptor/issues/83

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