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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.50%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 4.0
- 7.1 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.50% probability · 42th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-122
- Source
- disclosure@vulncheck.com
EPSS moved from 0.5% on 21 October 2026 to 0.5% on 27 October 2026.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.