GHSA-h47f-gmjp-m7rr: compliance-trestle (CVE-2026-52776)

compliance-trestle has an URLSecurityValidator SSRF allowlist bypass via IPv4-mapped IPv6 and 0.0.0.0

CVSS 8.6 HighEPSS 0.0044 · 38th percentile

Published by the GitHub Advisory Database at 12 Aug 2026, 15:21 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
compliance-trestle	PyPI	<4.1.0	4.1.0

Identifiers

GHSA-h47f-gmjp-m7rr · CVE-2026-52776 · PYSEC-2026-3659

Weakness (CWE)

CWE-184 · CWE-918

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

compliance-trestle before 4.1.0 has an SSRF bypass: its URL validator misses IPv4-mapped IPv6 addresses and 0.0.0.0. An attacker who can supply an OSCAL artifact that trestle fetches can reach cloud metadata, loopback, or internal services. Upgrade to 4.1.0; until then, avoid untrusted OSCAL profiles.

Written 5 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.6	High	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0044, the 38th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:39 UTC First seen by agentprime
31 Oct 2026, 14:39 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.