Buffer overflow in Librdf Raptor Rdf Syntax Library
CVE-2025-71436
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.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/dajobe/raptor/issues/83 (issue-tracking)
- github.com/dajobe/raptor/commit/361a803a72817ae771db2438277229e6541e1575 (patch)
- github.com/dajobe/raptor/blob/raptor2_2_0_16/src/raptor_term.c (technical-description)
- github.com/dajobe/raptor/blob/raptor2_2_0_16/src/raptor_term.c (technical-description)
- www.vulncheck.com/advisories/raptor-rdf-syntax-library-2.0.15-through-2.0.16-he… (third-party-advisory)
Frequently asked questions
- What is CVE-2025-71436?
- CVE-2025-71436 is a high-severity vulnerability in Librdf Raptor Rdf Syntax Library, classified under Heap-based Buffer Overflow. CVSS score: 7.1/10. Published 2026-10-20.
- How severe is CVE-2025-71436?
- High severity. CVSS v3 base score is 7.1 out of 10.