{"id":"CVE-2026-55777","summary":"GoAccess: Out-of-bounds heap read in parse_ios() via crafted User-Agent leads to remote crash/DoS","details":"GoAccess is a real-time web log analyzer and interactive viewer that runs in a terminal in *nix systems or through the browser. Prior to 1.11, the parse_ios() function uses an attacker-controlled keyword-to-OS offset as both the source offset and copy length for memmove, allowing a crafted User-Agent in a processed access log to read up to approximately 4 KB beyond the heap allocation and conditionally crash GoAccess. This issue is fixed in version 1.11.","aliases":["GHSA-5phr-qpgf-hgrg"],"modified":"2026-10-28T10:52:18.598807140Z","published":"2026-07-30T20:37:40.575Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-125"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55777.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55777.json"},{"type":"ADVISORY","url":"https://github.com/allinurl/goaccess/security/advisories/GHSA-5phr-qpgf-hgrg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55777"},{"type":"FIX","url":"https://github.com/allinurl/goaccess/commit/ba813ed97d998dbdcb8d87e178799a4bb2da9e81"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/allinurl/goaccess","events":[{"introduced":"0"},{"fixed":"615490d44e43544ec778e0841047772d313f14b3"},{"fixed":"ba813ed97d998dbdcb8d87e178799a4bb2da9e81"}],"database_specific":{"extracted_events":[{"source":"AFFECTED_FIELD","strategy":"StringRangeExpression","range":[{"introduced":"0"},{"fixed":"1.11"}]},{"range":[{"fixed":"ba813ed97d998dbdcb8d87e178799a4bb2da9e81"}],"source":"REFERENCES_COMMIT"}]}}],"versions":["v1.10.2","v1.10.1","v1.10","v1.9.4","v1.9.2","v1.9.1","v1.9","v1.8.1","v1.8","list","v1.7.2","v1.7.1","v1.7","v1.6.5","v1.6.4","v1.6.3","v1.6.2","v1.6.1","v1.6","v1.5.7","v1.5.6","v1.5.5","v1.5.4","v1.5.3","v1.5.2","v1.5.1","v1.5","v1.4.6","v1.4.5","v1.4.4","v1.4.3","v1.4.2","v1.4.1","v1.4","v0.8","v0.6"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55777.json","vanir_signatures":[{"source":"https://github.com/allinurl/goaccess/commit/ba813ed97d998dbdcb8d87e178799a4bb2da9e81","target":{"file":"src/opesys.c","function":"parse_ios"},"deprecated":false,"digest":{"function_hash":"259694106751180817752874489220024316186","length":427},"id":"CVE-2026-55777-9ee483e9","signature_type":"Function","signature_version":"v1"},{"deprecated":false,"digest":{"line_hashes":["262058444158249902851174790630391218748","317085133410112339331123141436377758688","77432167615781091938045883110615317906","18815247221543410513439915825559918934"],"threshold":0.9},"id":"CVE-2026-55777-d1674b5f","signature_type":"Line","signature_version":"v1","source":"https://github.com/allinurl/goaccess/commit/ba813ed97d998dbdcb8d87e178799a4bb2da9e81","target":{"file":"src/opesys.c"}},{"deprecated":false,"digest":{"line_hashes":["48240599272509140524177217664582981722","111427937077305213561267474037295287471","84696669337637875754534043180195581490","5313795016067787971193446244959463772"],"threshold":0.9},"id":"CVE-2026-55777-d37fedd3","signature_type":"Line","signature_version":"v1","source":"https://github.com/allinurl/goaccess/commit/615490d44e43544ec778e0841047772d313f14b3","target":{"file":"src/gstorage.c"}}],"vanir_signatures_modified":"2026-10-28T10:52:18Z"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"}]}