PatchTheCVEvinyl cache vulnerabilities and fixes
Recent CVEs affecting vinyl cache, with upgrade or downgrade steps. 3 tracked.
Also searched as: vinylcache.
vinyl cache has 3 tracked vulnerabilities, 0 critical. A fixed release or vendor patch exists for 2. Most recent: 2026-04-12. Highest priority: CVE-2026-34475 (score 27/100).
- CVE-2026-34475 MEDIUM 5.4 UPGRADE UPGRADE Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mi
- CVE-2026-40396 MEDIUM 4.0 DOWNGRADE Varnish Cache 9 before 9.0.1 allows a "workspace overflow" denial of service (daemon panic) after timeout_ling
- CVE-2026-40394 MEDIUM 4.0 UPGRADE DOWNGRADE Varnish Cache 9 before 9.0.1 and Varnish Enterprise before 6.0.16r11 allows a "workspace overflow" denial of s
FAQ
How do I fix vinyl cache 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 vinyl cache being exploited right now?
None of the tracked vinyl cache CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which vinyl cache CVE should I patch first?
CVE-2026-34475 currently ranks highest (27/100): Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mi.