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CVE-2026-112273

5.3 · MEDIUM

libtins through 4.6 contains a heap out-of-bounds read vulnerability in DNS::compose_name in src/dns.cpp that allows remote attackers to read past the packet buffer by sending a label ending exactl…

Published Oct 19, 2026CWE-125EPSS 0.56%

Overview

CVE-2026-112273 is a medium-severity vulnerability. It was published on October 19, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

libtins through 4.6 contains a heap out-of-bounds read vulnerability in DNS::compose_name in src/dns.cpp that allows remote attackers to read past the packet buffer by sending a label ending exactly at the packet end. Attackers can deliver crafted DNS packets whose additional, answer, or authority records trigger a one-byte read when parsed, crashing applications on hardened allocators.

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/mfontanini/libtinsGitHubgithub.com/mfontanini/libtins/blob/v4.6/src/dns.cpp#L338-L389Refhackmd.io/@haindpwn/libtins-dns-name-parsing-oob-readRefwww.vulncheck.com/advisories/libtins-through-4.6-heap-out-of-bounds-read-via-dns-compose-nameRefhackmd.io/@haindpwn/cve-2026-112273-112274-libtins-dns-name-parsing-oob-read

How CyberStrike helps

Frequently asked questions

What is CVE-2026-112273?

CVE-2026-112273 is a medium-severity vulnerability. It was published on October 19, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-112273?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-112273?

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-2026-112273?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-112273 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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