{"id":"CVE-2026-93749","aliases":["AZL-103442","AZL-103478","CLSA-2026-1792668516","DEBIAN-CVE-2026-93749","EUVD-2026-83254","GHSA-68fv-2mgg-jv7q","ROOT-APP-NPM-CVE-2026-93749","UBUNTU-CVE-2026-93749"],"status":"published","title":"source-map-js through 1.2.1 Event Loop Denial of Service","description":"source-map-js through 1.2.1 fails to validate the per-section offset line value in indexed source maps, allowing attackers to specify arbitrary numeric values. Attackers can supply extremely large offset line values that cause synchronous event loop blocking for extended periods, preventing the service from handling other requests.","severity":{"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","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00455,"percentile":0.3994,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1284"],"published":"2026-09-18T17:51:34Z","modified":"2026-11-05T05:36:30Z","fixes":[{"ecosystem":"npm","package":"source-map-js","fixed_in":["1.2.2"],"sources":["ghsa","osv"]},{"ecosystem":"TuxCare:npm","package":"source-map-js","fixed_in":["1.2.1-tuxcare.1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"node-postcss","fixed_in":["8.5.31+~cs10.2.26-1"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"source-map-js","fixed_in":["1.2.1-aikido.1","1.0.2-aikido.1"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"@rootio/source-map-js","fixed_in":["1.2.1-root.io.1","1.0.2-root.io.1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"source-map-js","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0"},{"fixed":"1.2.2"}]}]},{"source":"osv","ecosystem":"Azure Linux:3","package":"js-jquery","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"3.5.0-4"}]}]},{"source":"osv","ecosystem":"Azure Linux:3","package":"python-tensorboard","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.16.2-6"}]}]},{"source":"osv","ecosystem":"TuxCare:npm","package":"source-map-js","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.2.1-tuxcare.0"},{"fixed":"1.2.1-tuxcare.1"}]}],"versions":["1.2.1"]},{"source":"osv","ecosystem":"Debian:12","package":"node-postcss","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.4.20+~cs8.0.23-1","8.4.20+~cs8.0.23-1+deb12u1","8.4.31+~cs8.0.26-1","8.4.39+~cs9.2.29-1","8.4.49+~cs9.2.32-1","8.5.12+~cs9.3.32-1","8.5.14+~cs9.3.34-1","8.5.15+~cs9.3.34-1","8.5.15+~cs9.3.38-1","8.5.15+~cs9.3.39-1","8.5.19+~cs10.2.23-1","8.5.21+~cs10.2.23-1","8.5.23+~cs10.2.23-1","8.5.25+~cs10.2.23-1","8.5.26+~cs10.2.24-1","8.5.28+~cs10.2.24-1","8.5.31+~cs10.2.26-1","8.5.6+~cs9.3.28-1","8.5.8+~cs9.3.30-1","8.5.9+~cs9.3.30-1"]},{"source":"osv","ecosystem":"Debian:13","package":"node-postcss","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.4.49+~cs9.2.32-1","8.5.12+~cs9.3.32-1","8.5.14+~cs9.3.34-1","8.5.15+~cs9.3.34-1","8.5.15+~cs9.3.38-1","8.5.15+~cs9.3.39-1","8.5.19+~cs10.2.23-1","8.5.21+~cs10.2.23-1","8.5.23+~cs10.2.23-1","8.5.25+~cs10.2.23-1","8.5.26+~cs10.2.24-1","8.5.28+~cs10.2.24-1","8.5.31+~cs10.2.26-1","8.5.6+~cs9.3.28-1","8.5.8+~cs9.3.30-1","8.5.9+~cs9.3.30-1"]},{"source":"osv","ecosystem":"Debian:14","package":"node-postcss","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.5.31+~cs10.2.26-1"}]}],"versions":["8.4.49+~cs9.2.32-1","8.5.12+~cs9.3.32-1","8.5.14+~cs9.3.34-1","8.5.15+~cs9.3.34-1","8.5.15+~cs9.3.38-1","8.5.15+~cs9.3.39-1","8.5.19+~cs10.2.23-1","8.5.21+~cs10.2.23-1","8.5.23+~cs10.2.23-1","8.5.25+~cs10.2.23-1","8.5.26+~cs10.2.24-1","8.5.28+~cs10.2.24-1","8.5.6+~cs9.3.28-1","8.5.8+~cs9.3.30-1","8.5.9+~cs9.3.30-1"]},{"source":"osv","ecosystem":"npm","package":"source-map-js","ranges":[{"type":"SEMVER","events":[{"introduced":"1.0.0"},{"fixed":"1.2.2"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"source-map-js","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.1-aikido.1"},{"fixed":"1.0.2-aikido.1"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@rootio/source-map-js","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.1-root.io.1"},{"fixed":"1.0.2-root.io.1"}]}]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"node-postcss","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.0.23-1","6.0.23-3"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"node-postcss","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.2.1+~cs5.3.23-8","8.4.5+~cs7.1.51-2","8.4.6+~cs7.3.21-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"node-postcss","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.4.20+~cs8.0.23-1","8.4.31+~cs8.0.26-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"node-postcss","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.5.8+~cs9.3.30-1","8.5.15+~cs9.3.34-1","8.5.15+~cs9.3.38-1","8.5.15+~cs9.3.39-1build1","8.5.25+~cs10.2.23-1","8.5.26+~cs10.2.24-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"node-postcss","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.5.6+~cs9.3.28-1","8.5.8+~cs9.3.30-1"]}],"products":[{"vendor":"7rulnik","product":"source-map-js"}],"references":[{"url":"https://github.com/7rulnik/source-map-js/issues/76","tags":["issue-tracking","report","web"]},{"url":"https://github.com/7rulnik/source-map-js","tags":["product","package","report"]},{"url":"https://github.com/7rulnik/source-map-js/blob/c1cd8904bb7bd0c7fb5879fcda48134d82a27934/lib/source-node.js#L115-L118","tags":["technical-description","article","web","report"]},{"url":"https://www.vulncheck.com/advisories/source-map-js-through-1.2.1-event-loop-denial-of-service","tags":["third-party-advisory","advisory","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93749","tags":["web","advisory"]},{"url":"https://github.com/7rulnik/source-map-js/pull/79","tags":["web"]},{"url":"https://github.com/7rulnik/source-map-js/commit/cf7658058ceeaa8619d5ae0ec90be6905209d016","tags":["web"]},{"url":"https://github.com/7rulnik/source-map-js/releases/tag/v1.2.2","tags":["web"]},{"url":"https://github.com/advisories/GHSA-68fv-2mgg-jv7q"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93749.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-93749","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-93749","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93749","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-93749","title":"source-map-js through 1.2.1 Event Loop Denial of Service","description":"source-map-js through 1.2.1 fails to validate the per-section offset line value in indexed source maps, allowing attackers to specify arbitrary numeric values. Attackers can supply extremely large offset line values that cause synchronous event loop blocking for extended periods, preventing the service from handling other requests.","status":"published","published":"2026-09-18T17:51:34.972Z","modified":"2026-09-24T14:23:08.247Z","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","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-1284"],"updated_at":"2026-11-02T14:19:54.122945Z"}],"euvd":[{"id":"EUVD-2026-83254","description":"source-map-js through 1.2.1 fails to validate the per-section offset line value in indexed source maps, allowing attackers to specify arbitrary numeric values. Attackers can supply extremely large offset line values that cause synchronous event loop blocking for extended periods, preventing the service from handling other requests.","status":"published","published":"2026-09-18T17:51:34Z","modified":"2026-09-24T14:23:08Z","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":"2026-11-02T17:27:57.035497Z"}],"ghsa":[{"id":"GHSA-68fv-2mgg-jv7q","title":"source-map-js allows event-loop denial of service through indexed source-map section offsets","description":"source-map-js through 1.2.1 fails to validate the per-section offset line value in indexed source maps, allowing attackers to specify arbitrary numeric values. Attackers can supply extremely large offset line values that cause synchronous event loop blocking for extended periods, preventing the service from handling other requests.","status":"published","published":"2026-09-18T18:31:44Z","modified":"2026-10-05T23:31:22Z","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"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-1284"],"updated_at":"2026-11-02T14:41:27.036917Z"}],"nvd":[{"id":"CVE-2026-93749","description":"source-map-js through 1.2.1 fails to validate the per-section offset line value in indexed source maps, allowing attackers to specify arbitrary numeric values. Attackers can supply extremely large offset line values that cause synchronous event loop blocking for extended periods, preventing the service from handling other requests.","status":"published","published":"2026-09-18T18:18:33.48Z","modified":"2026-09-22T20:25:55.87Z","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/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":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-1284"],"updated_at":"2026-11-02T14:12:50.043898Z"}],"osv":[{"id":"CVE-2026-93749","title":"source-map-js through 1.2.1 Event Loop Denial of Service","description":"source-map-js through 1.2.1 fails to validate the per-section offset line value in indexed source maps, allowing attackers to specify arbitrary numeric values. Attackers can supply extremely large offset line values that cause synchronous event loop blocking for extended periods, preventing the service from handling other requests.","status":"published","published":"2026-09-18T17:51:34.972Z","modified":"2026-10-28T02:30:55.55400112Z","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"}],"cwes":["CWE-1284"],"updated_at":"2026-11-02T15:45:20.931171Z"},{"id":"DEBIAN-CVE-2026-93749","description":"source-map-js through 1.2.1 fails to validate the per-section offset line value in indexed source maps, allowing attackers to specify arbitrary numeric values. Attackers can supply extremely large offset line values that cause synchronous event loop blocking for extended periods, preventing the service from handling other requests.","status":"published","published":"2026-09-18T18:18:33.48Z","modified":"2026-10-23T16:02:23.079870709Z","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/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":"high"}],"updated_at":"2026-11-02T15:46:06.846102Z"},{"id":"GHSA-68fv-2mgg-jv7q","title":"source-map-js allows event-loop denial of service through indexed source-map section offsets","description":"source-map-js through 1.2.1 fails to validate the per-section offset line value in indexed source maps, allowing attackers to specify arbitrary numeric values. Attackers can supply extremely large offset line values that cause synchronous event loop blocking for extended periods, preventing the service from handling other requests.","status":"published","published":"2026-09-18T18:31:44Z","modified":"2026-10-05T23:45:07.974936711Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"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"}],"cwes":["CWE-1284"],"updated_at":"2026-11-02T15:46:39.266402Z"},{"id":"UBUNTU-CVE-2026-93749","description":"source-map-js through 1.2.1 fails to validate the per-section offset line value in indexed source maps, allowing attackers to specify arbitrary numeric values. Attackers can supply extremely large offset line values that cause synchronous event loop blocking for extended periods, preventing the service from handling other requests.","status":"published","published":"2026-09-18T18:18:00Z","modified":"2026-10-17T13:01:18.581271851Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"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":"2026-11-02T16:57:44.071534Z"},{"id":"AZL-103442","title":"CVE-2026-93749 affecting package js-jquery 3.5.0-4","description":"source-map-js through 1.2.1 fails to validate the per-section offset line value in indexed source maps, allowing attackers to specify arbitrary numeric values. Attackers can supply extremely large offset line values that cause synchronous event loop blocking for extended periods, preventing the service from handling other requests.","status":"published","published":"2026-09-18T18:18:33Z","modified":"2026-11-05T05:36:30Z","updated_at":"2026-11-05T16:41:17.528763Z"},{"id":"AZL-103478","title":"CVE-2026-93749 affecting package python-tensorboard 2.16.2-6","description":"source-map-js through 1.2.1 fails to validate the per-section offset line value in indexed source maps, allowing attackers to specify arbitrary numeric values. Attackers can supply extremely large offset line values that cause synchronous event loop blocking for extended periods, preventing the service from handling other requests.","status":"published","published":"2026-09-18T18:18:33Z","modified":"2026-09-28T05:39:54Z","updated_at":"2026-11-02T15:28:00.794214Z"},{"id":"CLSA-2026-1792668516","title":"TuxCare security update for source-map-js (1 CVE)","description":"TuxCare rebuilt source-map-js to address 1 CVE. Fixed in 1.2.1-tuxcare.1.","status":"published","published":"2026-10-22T11:28:36Z","modified":"2026-10-22T14:15:04.905137946Z","updated_at":"2026-11-02T15:43:54.981307Z"},{"id":"ROOT-APP-NPM-CVE-2026-93749","title":"CVE-2026-93749 in source-map-js - Patched by Root","description":"Root has patched CVE-2026-93749 in the source-map-js package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-10-16T07:12:29Z","modified":"2026-10-16T08:15:08.113034637Z","updated_at":"2026-11-02T15:53:27.649662Z"}]}}