CVE-2026-13067: When PROXY protocol v2 is used on the Unix domain socket path, roles derived from X.509 client certificates may not be validated against the configured tlsCATrusts allow-list. This

mediumCVSS 6.3CVE-2026-13067

When PROXY protocol v2 is used on the Unix domain socket path, roles derived from X.509 client certificates may not be validated against the configured tlsCATrusts allow-list. This can result in unintended role assignments following MONGODB-X509 authentication. Affected scenarios require local access to the proxy Unix domain socket and a valid X.509 certificate issued by a trusted certificate authority.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 6.3
Published: 2026-07-22
Last updated: 2026-07-24
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-13067

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-130670.07% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 0% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-13067	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownMongoDB Multiple Vulnerabilitieshkcert
unknownMultiple vulnerabilities in MongoDB (July 24, 2026)cert-fr-avis
high[NEW] [high] MongoDB: Multiple vulnerabilitiescert-bund

Recent advisories for When PROXY protocol

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

mediumCVE-2026-58158: Apache Traffic Server mishandles PROXY protocol input, truncating ports and overflowing the st…nvd · 2026-07-29
lowCVE-2026-54478: In NLnet Labs Unbound 1.18.0 up to and including 1.25.1, when Unbound listens on a 'proxy-prot…nvd · 2026-07-22
highCVE-2026-47737: Puma is a Ruby/Rack web server built for parallelism. From 5.5.0 until 7.2.1 and 8.0.2, Puma i…nvd · 2026-07-14
highCVE-2026-47736: Puma is a Ruby/Rack web server built for parallelism. From 5.5.0 until 7.2.1 and 8.0.2, when P…nvd · 2026-07-14
highCVE-2026-50480: Heap-based buffer overflow in Windows Web Proxy Auto-Discovery Protocol (WPAD) allows an autho…nvd · 2026-07-14
highCVE-2026-49800: Integer overflow or wraparound in Windows Web Proxy Auto-Discovery Protocol (WPAD) allows an a…nvd · 2026-07-14