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CVE-2025-71436

7.1 · HIGH

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 uns…

Published Oct 20, 2026CWE-122EPSS 0.50%

Overview

CVE-2025-71436 is a high-severity vulnerability. It was published on October 20, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/dajobe/raptor/blob/raptor2_2_0_16/src/raptor_term.c#L200-L218GitHubgithub.com/dajobe/raptor/blob/raptor2_2_0_16/src/raptor_term.c#L270-L287GitHubgithub.com/dajobe/raptor/commit/361a803a72817ae771db2438277229e6541e1575GitHubgithub.com/dajobe/raptor/issues/83Refwww.vulncheck.com/advisories/raptor-rdf-syntax-library-2.0.15-through-2.0.16-heap-buffer-overflow-via-language-tagGitHubgithub.com/dajobe/raptor/issues/83

How CyberStrike helps

Frequently asked questions

What is CVE-2025-71436?

CVE-2025-71436 is a high-severity vulnerability. It was published on October 20, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2025-71436?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-71436?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-71436?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-71436 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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