CVE-2026-111808: Red Hat Denial of Service via malformed padded HTTP/2 DATA frame
This Red Hat advisory covers CVE-2026-111808.
Key facts
- Vendor rating
- High, CVSS 8.6
- CISA KEV
- Not listed (catalogue checked )
- Versions named
- 8.0.0; 8.1.11; 9.0.0 and 4 more below
- Fixed in
- 9.2.16, 10.1.5, 10.2.1
- Source published
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Related products & platforms
Description
Denial of Service via malformed padded HTTP/2 DATA frame. Red Hat rates this important (CVSS 8.6).
Weakness: CWE-130.
Text from the source record.
- 8.0.0
- 8.1.11
- 9.0.0
- 9.2.15
- 10.0.0
- 10.1.4
- 10.2.0
Official advisory · high-confidence parse· fetched ·verify at source
How to fix CVE-2026-111808
Upgrade to a fixed release named by Red Hat:
- 9.2.16
- 10.1.5
- 10.2.1
Vendor guidance
- Upgrade Apache Traffic Server to 9.2.16, 10.1.5, or 10.2.1. As a workaround, disabling HTTP/2 on the proxy (proxy.config.http2.enabled) or restricting HTTP/2 client access reduces exposure to backend worker-pool exhaustion.
CVE-2026-111808 in other vendors' advisories
- Apache: CVE-2026-111808, high severity, fixed in 9.2.16, 10.1.5, 10.2.1
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