{"id":"CVE-2025-53628","aliases":["DEBIAN-CVE-2025-53628","EUVD-2025-21053","SUSE-SU-2026:20600-1","UBUNTU-CVE-2025-53628","openSUSE-SU-2026:20295-1"],"status":"published","title":"cpp-httplib does not limit the length of a line","description":"cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.20.1, cpp-httplib does not have a limit for a unique line, permitting an attacker to explore this to allocate memory arbitrarily. This vulnerability is fixed in 0.20.1. NOTE: This vulnerability is related to CVE-2025-53629.","severity":{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00524,"percentile":0.44825,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-444","CWE-770","CWE-835"],"published":"2025-07-10T19:45:54Z","modified":"2026-11-04T20:02:57Z","fixes":[{"ecosystem":"Debian:14","package":"cpp-httplib","fixed_in":["0.25.0+ds-3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"cpp-httplib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.11.4+ds-1","0.11.4+ds-1+deb12u1","0.11.4+ds-2","0.11.4+ds-3","0.13.1+ds-1","0.14.0+ds-1","0.14.1+ds-1","0.14.1+ds-2","0.14.2+ds-1","0.14.3+ds-1","0.14.3+ds-1.1","0.14.3+ds-1.1~exp1","0.15.3+ds-1","0.15.3+ds-2","0.15.3+ds-3","0.16.0+ds-1","0.16.3+ds-1","0.16.3+ds-2","0.18.0+ds-1","0.18.7-1","0.20.1+ds-3","0.25.0+ds-1","0.26.0+ds-2","0.41.0+ds-1","0.41.0+ds-2","0.41.0+ds-3","0.41.0+ds-3~bpo13+1"]},{"source":"osv","ecosystem":"Debian:13","package":"cpp-httplib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.18.7-1","0.18.7-1+deb13u1","0.20.1+ds-3","0.25.0+ds-1","0.26.0+ds-2","0.41.0+ds-1","0.41.0+ds-2","0.41.0+ds-3","0.41.0+ds-3~bpo13+1"]},{"source":"osv","ecosystem":"Debian:14","package":"cpp-httplib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.25.0+ds-3"}]}],"versions":["0.18.7-1","0.20.1+ds-3","0.25.0+ds-1"]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 16.0","package":"cpp-httplib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.22.0-160000.4.1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP applications 16.0","package":"cpp-httplib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.22.0-160000.4.1"}]}],"bundled":2},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"cpp-httplib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.9+ds-1","0.9.10+ds-1","0.10.1+ds-1","0.10.2+ds-1","0.10.3+ds-1","0.10.3+ds-1ubuntu0.1~esm1","0.10.3+ds-1ubuntu0.1~esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"cpp-httplib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.13.1+ds-1ubuntu1","0.14.3+ds-1","0.14.3+ds-1.1","0.14.3+ds-1.1build1","0.14.3+ds-1.1build2","0.14.3+ds-1.1ubuntu0.1~esm1","0.14.3+ds-1.1ubuntu0.1~esm2"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"cpp-httplib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.18.7-1","0.18.7-1ubuntu0.25.10.1","0.18.7-1ubuntu0.25.10.2"]},{"source":"osv","ecosystem":"openSUSE:Leap 16.0","package":"cpp-httplib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.22.0-160000.4.1"}]}],"bundled":2}],"products":[{"vendor":"yhirose","product":"cpp-httplib"}],"references":[{"url":"https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-j6p8-779x-p5pw","tags":["x_refsource_CONFIRM","exploit","Exploit","Vendor Advisory","advisory","report"]},{"url":"https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-qjmq-h3cc-qv6w","tags":["x_refsource_MISC","Not Applicable","advisory","report"]},{"url":"https://github.com/yhirose/cpp-httplib/commit/7b752106ac42bd5b907793950d9125a0972c8e8e","tags":["x_refsource_MISC","Patch","fix","report"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/53xxx/CVE-2025-53628.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-53628","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2025-53628","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-202620600-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1246468","tags":["report"]},{"url":"https://bugzilla.suse.com/1246471","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2025-53628","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-53629","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2025-53628","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-53628","tags":["report"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2025-53628","title":"cpp-httplib does not limit the length of a line","description":"cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.20.1, cpp-httplib does not have a limit for a unique line, permitting an attacker to explore this to allocate memory arbitrarily. This vulnerability is fixed in 0.20.1. NOTE: This vulnerability is related to CVE-2025-53629.","status":"published","published":"2025-07-10T19:45:54.96Z","modified":"2025-07-10T20:26:28.864Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-835","CWE-770"],"updated_at":"2026-11-02T14:32:49.503917Z"}],"euvd":[{"id":"EUVD-2025-21053","description":"cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.20.1, cpp-httplib does not have a limit for a unique line, permitting an attacker to explore this to allocate memory arbitrarily. This vulnerability is fixed in 0.20.1. NOTE: This vulnerability is related to CVE-2025-53629.","status":"published","published":"2025-07-10T19:45:54Z","modified":"2025-07-10T20:26:28Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T20:32:09.102762Z"}],"nvd":[{"id":"CVE-2025-53628","description":"cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.20.1, cpp-httplib does not have a limit for a unique line, permitting an attacker to explore this to allocate memory arbitrarily. This vulnerability is fixed in 0.20.1. NOTE: This vulnerability is related to CVE-2025-53629.","status":"published","published":"2025-07-10T20:15:27.22Z","modified":"2026-06-17T09:38:36.06Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/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"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-770","CWE-835","CWE-444"],"updated_at":"2026-11-02T14:11:18.285862Z"}],"osv":[{"id":"CVE-2025-53628","title":"cpp-httplib does not limit the length of a line","description":"cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.20.1, cpp-httplib does not have a limit for a unique line, permitting an attacker to explore this to allocate memory arbitrarily. This vulnerability is fixed in 0.20.1. NOTE: This vulnerability is related to CVE-2025-53629.","status":"published","published":"2025-07-10T19:45:54.96Z","modified":"2026-10-28T10:45:34.703682528Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-770","CWE-835"],"updated_at":"2026-11-02T15:44:50.45326Z"},{"id":"DEBIAN-CVE-2025-53628","description":"cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.20.1, cpp-httplib does not have a limit for a unique line, permitting an attacker to explore this to allocate memory arbitrarily. This vulnerability is fixed in 0.20.1. NOTE: This vulnerability is related to CVE-2025-53629.","status":"published","published":"2025-07-10T20:15:27.22Z","modified":"2026-09-01T20:05:53.889383448Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:47.378563Z"},{"id":"UBUNTU-CVE-2025-53628","description":"cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.20.1, cpp-httplib does not have a limit for a unique line, permitting an attacker to explore this to allocate memory arbitrarily. This vulnerability is fixed in 0.20.1. NOTE: This vulnerability is related to CVE-2025-53629.","status":"published","published":"2025-07-10T20:15:00Z","modified":"2026-11-04T20:02:57.927605289Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-04T21:44:46.937337Z"},{"id":"openSUSE-SU-2026:20295-1","title":"Security update for cpp-httplib","description":"This update for cpp-httplib fixes the following issues:\n\n- CVE-2025-53629: header can allocate memory arbitrarily in the server, potentially leading to its exhaustion\n  (bsc#1246471).\n- CVE-2025-53628: HTTP header smuggling due to insecure trailers merge (bsc#1246468).\n","status":"published","published":"2026-03-02T10:20:20Z","modified":"2026-03-23T04:54:49.98121Z","updated_at":"2026-11-02T16:58:41.463445Z"},{"id":"SUSE-SU-2026:20600-1","title":"Security update for cpp-httplib","description":"This update for cpp-httplib fixes the following issues:\n\n- CVE-2025-53629: header can allocate memory arbitrarily in the server, potentially leading to its exhaustion\n  (bsc#1246471).\n- CVE-2025-53628: HTTP header smuggling due to insecure trailers merge (bsc#1246468).\n","status":"published","published":"2026-03-02T10:16:12Z","modified":"2026-03-23T04:53:04.002056Z","updated_at":"2026-11-02T15:54:01.953589Z"}]}}