{"schemaVersion":3,"id":"MGASA-2026-0250","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Updated haproxy packages fix security vulnerability\n\nHAProxy 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)","dates":{"published":"2026-07-14T01:55:37.000Z","modified":"2026-07-14T02:00:22.754Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"mageia","product":"haproxy","name":"haproxy","label":"haproxy","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/haproxy","purlType":"rpm","versions":[{"text":"< 3.4.2-1.2.mga10","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.4.2-1.2.mga10","eol":null,"hubHref":null},{"vendor":"mageia","product":"haproxy","name":"haproxy","label":"haproxy","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/haproxy","purlType":"rpm","versions":[{"text":"< 2.8.26-1.mga9","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.8.26-1.mga9","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://advisories.mageia.org/MGASA-2026-0250.html","label":"advisories.mageia.org/MGASA-2026-0250.html","hostname":"advisories.mageia.org","tags":["Advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=35748","label":"bugs.mageia.org/show_bug.cgi?id=35748","hostname":"bugs.mageia.org","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2026-55203","CVE-2026-55204"],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-07-14T01:55:37.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-07-14T02:00:22.754Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T07:38:11.868Z","stale":false,"partial":false}}