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CVE-2026-110353

7.5 high SSVC exploitation: none Published
NVD · CVE.org

HAProxy 3.2 before 3.4.6 allows a remote unauthenticated attacker to cause a denial of service (worker-thread CPU exhaustion) via a truncated HTTP/2 PING frame. h2c_handle_ping in src/mux_h2.c does not check for a short read, unlike the other H2 frame handlers. Because the incomplete frame cannot be processed, its data is never consumed, and the H2 multiplexer tasklet is repeatedly woken by that pending data without making progress. The CPU spins until timeout http-request closes the connection, and an attacker opening many such connections can sustain high CPU usage.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 7

  1. StatusAwaiting Analysis → PublishedNVD modified 2026-10-22 02:53
  2. StatusPublished → Awaiting AnalysisNVD modified 2026-10-22 19:17
  3. StatusAwaiting Analysis → PublishedNVD modified 2026-10-22 02:53
  4. StatusPublished → Awaiting AnalysisNVD modified 2026-10-22 17:36
  5. StatusReceived → PublishedNVD modified 2026-10-22 02:53
  6. StatusPublished → ReceivedNVD modified 2026-10-22 03:16
  7. First seenCVSS 7.5 · haproxyNVD modified 2026-10-22 02:53

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 1