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Apache Traffic Server desynchronization zero-day (CVE-2026-63078)

Vulnerability
First reported
Last updated
Happening score
H score 35
1 unique sources, 1 articles

Summary

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A desynchronization zero-day in Apache Traffic Server was exposed and later patched, leaving a concrete server request-handling flaw tied to CVE-2026-63078. The weakness can disrupt how front-end and back-end responses are matched, creating risk for request confusion and downstream exposure. Public record checks at publication time did not yet show the CVE in CVE.org or NVD, so the fixed-release mapping remained uncertain.

Related Happenings

HTTP Terminator discovery of new HTTP desynchronization techniques and response queue poisoning

Technical Analysis
H score44 First: 07.08.2026 13:09 Last: 07.08.2026 13:09 Sources 1

How related: PortSwigger says HTTP Terminator, an artificial intelligence (AI)-assisted research system built by James Kettle, generated and proved new HTTP desynchronization techniques after exploring 30,000 candidate attack vectors.

About this happening: HTTP Terminator generated and proved new HTTP desynchronization techniques after exploring 30,000 candidate attack vectors, expanding the attack surface for parser-con...

Open Happening

OpenDCIM multi-flaw exploitation wave (CVE-2026-28515, CVE-2026-28516, CVE-2026-28517)

Exploitation Wave
H score46 First: 17.05.2026 14:57 Last: 17.05.2026 14:57 Sources 1

About this happening: openDCIM is seeing an active exploitation wave tied to CVE-2026-28515, CVE-2026-28516, and CVE-2026-28517, with attackers targeting vulnerable installations an...

Open Happening

Timeline

  1. 07.08.2026 13:09 2 articles · 7h ago

    Apache Traffic Server desynchronization zero-day is exposed and patched as CVE-2026-63078

    Initial Disclosure

    A malformed request in a human-guided discovery cascade exposed a desynchronization zero-day in Apache Traffic Server, and the issue was later patched and tracked as CVE-2026-63078. Public checks on August 7 did not find a record for CVE-2026-63078 in CVE.org or NVD, and Apache's July advisory did not list it, leaving the fixed Traffic Server release mapping unresolved.

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