{"id":"MGASA-2026-0250","summary":"Updated haproxy packages fix security vulnerability","details":"HAProxy through 3.4.0, fixed in commit 5985276, contains an integer overflow\nvulnerability in the fcgi_conn structure's drl field that allows buffer\nmisparse as new FCGI record headers. When contentLength is 65535 and\npaddingLength is 1 or more, the drl field wraps to 0, causing incorrect\nrecord consumption and allowing malicious FastCGI backends to desynchronize\nthe FCGI framing parser, potentially causing request routing errors, response\nsmuggling, or memory safety issues.\n(CVE-2026-55203)\nHAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer\ndereference vulnerability in hpack_dht_insert() within src/hpack-tbl.c that\nfails to validate the return value of hpack_dht_defrag() when the memory pool\nis exhausted. An attacker can trigger HPACK dynamic table insertions under\nmemory pressure to dereference a NULL pointer and crash HAProxy worker\nprocesses, causing denial of service.\n(CVE-2026-55204)\n","modified":"2026-07-14T02:00:22.754711982Z","published":"2026-07-14T01:55:37Z","upstream":["CVE-2026-55203","CVE-2026-55204"],"references":[{"type":"ADVISORY","url":"https://advisories.mageia.org/MGASA-2026-0250.html"},{"type":"REPORT","url":"https://bugs.mageia.org/show_bug.cgi?id=35748"}],"affected":[{"package":{"name":"haproxy","ecosystem":"Mageia:10","purl":"pkg:rpm/mageia/haproxy?arch=source&distro=mageia-10"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.2-1.2.mga10"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2026-0250.json"}},{"package":{"name":"haproxy","ecosystem":"Mageia:9","purl":"pkg:rpm/mageia/haproxy?arch=source&distro=mageia-9"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8.26-1.mga9"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2026-0250.json"}}],"schema_version":"1.7.5","credits":[{"name":"Mageia","contact":["https://wiki.mageia.org/en/Packages_Security_Team"],"type":"COORDINATOR"}]}