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CVE-2026-47729

critical

Description

Debian Linux - squid - None Red Hat Enterprise Linux - squid: memory disclosure in FTP gateway Ubuntu Linux - Out-of-bounds Read attack against the FTP gateway

References

https://www.theregister.com/security/2026/06/23/mythos-discovers-squidbleed-a-memory-leak-thats-gone-undetected-since-clinton-era/5260367

https://www.securityweek.com/decades-old-squid-proxy-flaw-squidbleed-can-expose-user-data/

https://thehackernews.com/2026/06/29-year-old-squid-proxy-bug-squidbleed.html

Details

Source: Mitre, NVD

Named Vulnerability: Squidbleed

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 9.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Severity: Critical

Vulnerability Watch

Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.

Vulnerability Being Monitored