What is GHSA-p8hx-6263-88h9?

GHSA-p8hx-6263-88h9 is a security advisory published by GitHub Security Advisories with High severity. Hickory DNS from 0.26.0 before 0.26.2 contains an integer underflow vulnerability in TSIG RDATA...

Which CVE IDs does GHSA-p8hx-6263-88h9 cover?

GHSA-p8hx-6263-88h9 covers the following CVE IDs: CVE-2026-123571. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-p8hx-6263-88h9?

GHSA-p8hx-6263-88h9 has a CVSS v3 base score of 7.5, published by GitHub Security Advisories.

GHSA-p8hx-6263-88h9HighCVSS 7.5

Hickory DNS from 0.26.0 before 0.26.2 contains an integer underflow vulnerability in TSIG RDATA...

Vendor

GitHub Security Advisories

Published

November 8, 2026

Last Modified

November 8, 2026

🔗 CVE IDs covered (1)

CVE-2026-123571 →

📋 Description

Hickory DNS from 0.26.0 before 0.26.2 contains an integer underflow vulnerability in TSIG RDATA decoding that allows remote attackers to trigger a panic via malformed records. Attackers can send a crafted TSIG record in DNS wire format to cause unchecked subtraction underflow, crashing builds with overflow checks enabled and causing denial of service.

🔗 References (4)

https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-x962-5xwx-fr8x
https://nvd.nist.gov/vuln/detail/CVE-2026-123571
https://www.vulncheck.com/advisories/hickory-dns-from-0.26.0-before-0.26.2-panic-via-tsig-rdata-decoding
https://github.com/advisories/GHSA-p8hx-6263-88h9