# CVE-2026-65100

## Summary

- **CVE ID:** CVE-2026-65100
- **Severity:** MEDIUM
- **CVSS Score:** 6.3 (CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N)
- **CWE:** CWE-696
- **Published:** Jul 29, 2026
- **Last Modified:** Jul 29, 2026

## Description

Apache Traffic Server updates the HTTP/2 HPACK dynamic table before confirming the header block encoded successfully, so an encode failure leaves the encoder out of sync with the peer decoder and corrupts subsequent header blocks on the connection.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

## Affected Products

- Apache Software Foundation — Apache Traffic Server (8.0.0)
- Apache Software Foundation — Apache Traffic Server (9.0.0)
- Apache Software Foundation — Apache Traffic Server (10.0.0)

## References

- [CNA](https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.35%
- **EPSS Percentile:** 28.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._