CVE-2026-55204

HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpackdhtinsert within src/hpack-tbl.c that fails to validate the return value of hpackdhtdefrag when the memory pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memo...

CVE-2026-55204 HAProxy - NULL Pointer Dereference in hpack_dht_insert Function

HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpackdhtinsert within src/hpack-tbl.c that fails to validate the return value of hpackdhtdefrag when the memory pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memo...

EUVD-2026-37906

HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpackdhtinsert within src/hpack-tbl.c that fails to validate the return value of hpackdhtdefrag when the memory pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memo...

PT-2026-50708

Name of the Vulnerable Software and Affected Versions HAProxy versions prior to 3.4.0 Description A null pointer dereference occurs in the hpack dht insert function within src/hpack-tbl.c because the return value of hpack dht defrag is not validated when the memory pool is exhausted. An attacker...

EUVD-2026-36541

Improper handling of HPACK dynamic table size updates in the AWS Common Runtime aws-c-http library might allow a remote threat actor operating a server to cause memory corruption on a connecting client application, potentially leading to arbitrary code execution, via a crafted sequence of HTTP/2...

PT-2026-48949

Name of the Vulnerable Software and Affected Versions aws-c-http versions prior to 0.11.0 Description Improper handling of HPACK dynamic table size updates in the AWS Common Runtime aws-c-http library allows a remote threat actor operating a server to cause memory corruption on a connecting clien...