# CVE-2026-93569

Netty HTTP/1→HTTP/2 authority mismatch allows bypass, cache poisoning, misrouting

- Page: https://www.vulneraibility.com/cve/CVE-2026-93569
- CVSS: 8.2
- Known exploited: not in CISA KEV as of our last sync
- EPSS: 2.19% (percentile 82.5)
- CISA SSVC: exploitation none, automatable yes, technical impact partial (assessed 2026-09-22)
- Weakness: CWE-444
- Published: 2026-09-18

## Affected

- Netty (HTTP/2 conversion modules)
- Netty-based proxies/gateways
- Applications using Netty HTTP stack

## Impact

Remote unauthenticated attackers can bypass proxy controls, cause cache poisoning, or misroute requests by exploiting Host vs request-target authority mismatch.

## Action

Immediate action required

## Recommendation

Apply vendor updates or mitigations; normalize Host/:authority handling and block conflicting requests

## References

- [advisory] https://access.redhat.com/errata/RHSA-2026:69440
- [advisory] https://access.redhat.com/errata/RHSA-2026:69470
- [advisory] https://access.redhat.com/errata/RHSA-2026:70257
- [advisory] https://access.redhat.com/errata/RHSA-2026:83612
- [other] https://access.redhat.com/security/cve/CVE-2026-93569
- [other] https://bugzilla.redhat.com/show_bug.cgi?id=2536962

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.