{"id":"CVE-2026-55777","aliases":["DEBIAN-CVE-2026-55777","EUVD-2026-51306","GHSA-5phr-qpgf-hgrg","OESA-2026-3263","UBUNTU-CVE-2026-55777"],"status":"published","title":"GoAccess: Out-of-bounds heap read in parse_ios() via crafted User-Agent leads to remote crash/DoS","description":"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.","severity":{"version":"4.0","score":5.3,"vector":"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00445,"percentile":0.39144,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125"],"published":"2026-07-30T20:37:40Z","modified":"2026-10-28T10:52:18Z","fixes":[{"ecosystem":"Debian:13","package":"goaccess","fixed_in":["1:1.9.3-1+deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"goaccess","fixed_in":["1:1.11-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"goaccess","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.10.1-1","1:1.11-1","1:1.7-1","1:1.8.1-1","1:1.9.1-1","1:1.9.3-1","1:1.9.4-1"]},{"source":"osv","ecosystem":"Debian:13","package":"goaccess","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.9.3-1+deb13u1"}]}],"versions":["1:1.9.3-1"]},{"source":"osv","ecosystem":"Debian:14","package":"goaccess","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.11-1"}]}],"versions":["1:1.10.1-1","1:1.9.3-1","1:1.9.4-1"]},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP4","package":"goaccess","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.6-3.oe2003sp4"}]}],"bundled":3},{"source":"osv","ecosystem":"openEuler:22.03-LTS-SP4","package":"goaccess","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.6-3.oe2203sp4"}]}],"bundled":3},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP1","package":"goaccess","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.2-2.oe2403sp1"}]}],"bundled":3},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP3","package":"goaccess","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.2-2.oe2403sp3"}]}],"bundled":3},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP4","package":"goaccess","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.2-2.oe2403sp4"}]}],"bundled":3},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"goaccess","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:0.8.3-1","1:0.9.4-1","1:0.9.4-1build1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"goaccess","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.2-3"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"goaccess","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.2-4","1:1.3-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"goaccess","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.4-1","1:1.5.1-1","1:1.5.1-1build1","1:1.5.5-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"goaccess","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.7-1","1:1.8.1-1","1:1.8.1-1build1","1:1.8.1-1build2","1:1.8.1-1build3"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"goaccess","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.9.4-1","1:1.10.1-1","1:1.11-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"goaccess","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.9.3-1","1:1.9.3-1build1","1:1.9.4-1"]}],"products":[{"vendor":"allinurl","product":"goaccess"}],"references":[{"url":"https://github.com/allinurl/goaccess/security/advisories/GHSA-5phr-qpgf-hgrg","tags":["x_refsource_CONFIRM","exploit","advisory"]},{"url":"https://github.com/allinurl/goaccess/commit/ba813ed97d998dbdcb8d87e178799a4bb2da9e81","tags":["x_refsource_MISC","fix"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55777.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55777","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-55777","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3263","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54715","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55768","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-55777","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-55777","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-55777","title":"GoAccess: Out-of-bounds heap read in parse_ios() via crafted User-Agent leads to remote crash/DoS","description":"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.","status":"published","published":"2026-07-30T20:37:40.575Z","modified":"2026-07-31T11:24:05.795Z","cvss":[{"version":"4.0","score":5.3,"vector":"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","level":"medium","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:20:12.260247Z"}],"euvd":[{"id":"EUVD-2026-51306","description":"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.","status":"published","published":"2026-07-30T20:37:40Z","modified":"2026-07-31T11:24:05Z","cvss":[{"version":"4.0","score":5.3,"vector":"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","level":"medium"}],"updated_at":"2026-11-02T18:02:26.304051Z"}],"nvd":[{"id":"CVE-2026-55777","description":"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.","status":"published","published":"2026-07-30T21:17:57.36Z","modified":"2026-10-23T22:10:00.16Z","cvss":[{"version":"4.0","score":5.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:12:33.955581Z"}],"osv":[{"id":"CVE-2026-55777","title":"GoAccess: Out-of-bounds heap read in parse_ios() via crafted User-Agent leads to remote crash/DoS","description":"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.","status":"published","published":"2026-07-30T20:37:40.575Z","modified":"2026-10-28T10:52:18.59880714Z","cvss":[{"version":"4.0","score":5.3,"vector":"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","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:45:11.609219Z"},{"id":"DEBIAN-CVE-2026-55777","description":"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.","status":"published","published":"2026-07-30T21:17:57.36Z","modified":"2026-10-24T09:47:26.059878724Z","cvss":[{"version":"4.0","score":5.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"updated_at":"2026-11-02T15:45:57.590991Z"},{"id":"OESA-2026-3263","title":"goaccess security update","description":"GoAccess is a real-time web log analyzer and interactive viewer that runs in a terminal in *nix systems. It provides fast and valuable HTTP statistics for system administrators that require a visual server report on the fly.\r\n\r\nSecurity Fix(es):\n\nGoAccess is a real-time web log analyzer and interactive viewer that runs in a terminal in *nix systems or through the browser. In version 1.10.2, parse_browser assumes the matched browser token begins with Opera and moves a trailing version substring to match plus five, allowing a crafted User-Agent in a processed access log to write one to four attacker-influenced bytes beyond the heap allocation and corrupt or crash GoAccess. This issue is fixed in version 1.11.(CVE-2026-54715)\n\nGoAccess is a real-time web log analyzer and interactive viewer that runs in a terminal in *nix systems or through the browser. Prior to version 1.11, the built-in WebSocket server narrows a 64-bit extended frame length into the signed 32-bit WSFrame.payloadlen field before enforcing the maximum frame size, allowing an unauthenticated remote client to bypass the guard and force an approximately 18-exabyte allocation request that terminates the process. This issue is fixed in version 1.11.(CVE-2026-55768)\n\nGoAccess 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.(CVE-2026-55777)","status":"published","published":"2026-08-07T02:42:41Z","modified":"2026-08-07T03:00:58.333496376Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T15:52:46.823443Z"},{"id":"UBUNTU-CVE-2026-55777","description":"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.","status":"published","published":"2026-07-30T21:17:00Z","modified":"2026-10-17T12:59:08.781457796Z","cvss":[{"version":"4.0","score":5.3,"vector":"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","level":"medium"}],"updated_at":"2026-11-02T16:56:41.382716Z"}]}}