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CVE PROGRAM SOURCE RECORD8.7 High

CVE-2026-55204

HAProxy - NULL Pointer Dereference in hpack_dht_insert Function

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Status
Published
Published
Updated
Assigning organization
VulnCheck

Description

HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpack_dht_insert() within src/hpack-tbl.c that fails to validate the return value of hpack_dht_defrag() when the memory pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memory pressure to dereference a NULL pointer and crash HAProxy worker processes, causing denial of service.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

haproxy haproxy

Default version status: unaffected

  • 0 to ≤ 3.4.0affected
  • 9a6d1fe3f00d86ab4ea6ea6ea0a5d48fc058a513unaffected
pkg:github/haproxy/haproxy

References