Home / mailings [USN-8435-1] Squid vulnerabilities
Posted on 16 June 2026
Ubuntu Security==========================================================================Ubuntu Security Notice USN-8435-1
June 16, 2026
squid vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 26.04 LTS
- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
Summary:
Several security issues were fixed in Squid.
Software Description:
- squid: Web proxy cache server
Details:
It was discovered that Squid incorrectly handled FTP gateway processing
under certain circumstances, which could result in an out-of-bounds read. A
remote attacker could use this issue to cause Squid to crash, resulting in
a denial of service, or possibly obtain sensitive information.
(CVE-2026-47729)
It was discovered that Squid incorrectly handled cache digest processing
under certain circumstances, which could result in a heap-based buffer
overflow. A remote attacker could use this issue to cause Squid to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2026-50012)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 26.04 LTS
squid 7.2-2ubuntu2.2
Ubuntu 25.10
squid 6.14-0ubuntu0.25.10.4
Ubuntu 24.04 LTS
squid 6.14-0ubuntu0.24.04.4
Ubuntu 22.04 LTS
squid 5.9-0ubuntu0.22.04.7
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8435-1
CVE-2026-47729, CVE-2026-50012
Package Information:
https://launchpad.net/ubuntu/+source/squid/7.2-2ubuntu2.2
https://launchpad.net/ubuntu/+source/squid/6.14-0ubuntu0.25.10.4
https://launchpad.net/ubuntu/+source/squid/6.14-0ubuntu0.24.04.4
https://launchpad.net/ubuntu/+source/squid/5.9-0ubuntu0.22.04.7
--===============5401047521123228629==Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
