Squid proxy patches confidentiality flaws
Multiple vulnerabilities in Squid proxy versions before 7.6 allow attackers to compromise data confidentiality.
Sourcecert.ssi.gouv.fr — open the original
What to check
- Applies to
- The 2 CVEs named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- No exploitation in the wild and no public exploit is recorded for the CVEs named.
The French national cybersecurity agency ANSSI has published an advisory regarding multiple security vulnerabilities affecting Squid proxy server versions prior to 7.6. The flaws enable attackers to breach data confidentiality, with one vulnerability's specifics not yet disclosed by the vendor.
Two CVEs have been assigned to track these issues: CVE-2026-47729 and CVE-2026-50012. GitHub security advisories GHSA-5vmx-9x64-9284 and GHSA-8c37-pxjq-qwrg were published on June 23, 2026, providing vendor-specific details. Organizations running affected Squid versions should consult the vendor bulletins and apply patches to version 7.6 or later.
Squid is a widely-deployed caching and forwarding HTTP proxy used across enterprise networks, making timely patching important for organizations relying on it for web traffic filtering and optimization.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0795
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