CVE-2026-65100 — Apache Traffic Server: HPACK encoder desynchronizes from the decoder after a failed header encode

CVE-2026-65100

Apache Traffic Server: HPACK encoder desynchronizes from the decoder after a failed header encode PUBLISHED

Description (CNA)

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 8.1.11, 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 (CNA)

Vendor / product	Versions
Apache Software Foundation / Apache Traffic Server	affected 8.0.0 through 8.1.11; affected 9.0.0 through 9.2.14; affected 10.0.0 through 10.1.3

CWE

CWE-696

References

https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.