http2 vulnerabilities and fixes

Recent CVEs affecting http2, with upgrade or downgrade steps. 1 tracked.

http2 has 1 tracked vulnerability, 0 critical. A fixed release or vendor patch exists for 1. Most recent: 2026-05-07. Highest priority: CVE-2026-33814 (score 46/100).

• CVE-2026-33814 HIGH 7.5 UPGRADE UPGRADE When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of writing CONTINUATION frames i

FAQ

How do I fix http2 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 http2 being exploited right now?

None of the tracked http2 CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which http2 CVE should I patch first?

CVE-2026-33814 currently ranks highest (46/100): When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of writing CONTINUATION frames i.

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