apt-cacher-ng vulnerabilities and fixes

Recent CVEs affecting apt-cacher-ng, with upgrade or downgrade steps. 2 tracked.

Also searched as: apt cacher ng.

apt-cacher-ng has 2 tracked vulnerabilities, 0 critical. A fixed release or vendor patch exists for 0. Most recent: 2025-09-29. Highest priority: CVE-2025-11146 (score 21/100).

• CVE-2025-11146 MEDIUM 5.4 DOWNGRADE Reflected Cross-site scripting (XSS) in Apt-Cacher-NG v3.2.1
• CVE-2025-11147 MEDIUM 5.4 DOWNGRADE Reflected cross-site scripting (XSS) in Apt-Cacher-NG v3.2.1

FAQ

How do I fix apt-cacher-ng vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is apt-cacher-ng being exploited right now?

None of the tracked apt-cacher-ng CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which apt-cacher-ng CVE should I patch first?

CVE-2025-11146 currently ranks highest (21/100): Reflected Cross-site scripting (XSS) in Apt-Cacher-NG v3.2.1.

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