{"id":"CVE-2026-105456","aliases":["EUVD-2026-114128","GHSA-pg4w-4q6c-jvpm"],"status":"published","title":"Stored XSS via HTML scrubber rule in RTIR","description":"RTIR extends RT's HTML scrubber to allow an internal link\n      placeholder, and the extension lets through any link that merely\n      contains the placeholder, including links using the executable\n      javascript: scheme. The change applies to the whole RT instance\n      once RTIR is installed, not only to RTIR's own queues. Anyone who\n      can add HTML content to a ticket on such an instance can store\n      such a link. That includes an unauthenticated sender of HTML email\n      to the Incident Reports queue, which RTIR opens to everyone by\n      default. Script runs when a user clicks the link, in that user's\n      session, and can act in RT with that user's authority.\n\n\nThis issue was fixed in version 5.0.11 and 6.0.4","severity":{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0045,"percentile":0.39546,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-10-30T15:22:07Z","modified":"2026-11-01T02:46:29Z","products":[{"vendor":"best practical solutions","product":"rt for incident response"}],"references":[{"url":"https://cert.pl/en/posts/2026/10/CVE-2026-105454","tags":["third-party-advisory","advisory"]},{"url":"https://requesttracker.com/rtir/","tags":["product","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-105456","tags":["advisory"]},{"url":"https://requesttracker.com/rtir"},{"url":"https://github.com/advisories/GHSA-pg4w-4q6c-jvpm"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105456.json","tags":["advisory"]},{"url":"https://github.com/bestpractical/rtir","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-105456","title":"Stored XSS via HTML scrubber rule in RTIR","description":"RTIR extends RT's HTML scrubber to allow an internal link\n      placeholder, and the extension lets through any link that merely\n      contains the placeholder, including links using the executable\n      javascript: scheme. The change applies to the whole RT instance\n      once RTIR is installed, not only to RTIR's own queues. Anyone who\n      can add HTML content to a ticket on such an instance can store\n      such a link. That includes an unauthenticated sender of HTML email\n      to the Incident Reports queue, which RTIR opens to everyone by\n      default. Script runs when a user clicks the link, in that user's\n      session, and can act in RT with that user's authority.\n\n\nThis issue was fixed in version 5.0.11 and 6.0.4","status":"published","published":"2026-10-30T15:22:07.644Z","modified":"2026-10-30T17:18:22.375Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:19:56.755658Z"}],"euvd":[{"id":"EUVD-2026-114128","description":"RTIR extends RT's HTML scrubber to allow an internal link\n      placeholder, and the extension lets through any link that merely\n      contains the placeholder, including links using the executable\n      javascript: scheme. The change applies to the whole RT instance\n      once RTIR is installed, not only to RTIR's own queues. Anyone who\n      can add HTML content to a ticket on such an instance can store\n      such a link. That includes an unauthenticated sender of HTML email\n      to the Incident Reports queue, which RTIR opens to everyone by\n      default. Script runs when a user clicks the link, in that user's\n      session, and can act in RT with that user's authority.\n\n\nThis issue was fixed in version 5.0.11 and 6.0.4","status":"published","published":"2026-10-30T15:22:07Z","modified":"2026-10-30T17:18:22Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:59:05.567782Z"}],"ghsa":[{"id":"GHSA-pg4w-4q6c-jvpm","title":"RTIR extends RT's HTML scrubber to allow an internal link\n      placeholder, and the extension...","description":"RTIR extends RT's HTML scrubber to allow an internal link\n      placeholder, and the extension lets through any link that merely\n      contains the placeholder, including links using the executable\n      javascript: scheme. The change applies to the whole RT instance\n      once RTIR is installed, not only to RTIR's own queues. Anyone who\n      can add HTML content to a ticket on such an instance can store\n      such a link. That includes an unauthenticated sender of HTML email\n      to the Incident Reports queue, which RTIR opens to everyone by\n      default. Script runs when a user clicks the link, in that user's\n      session, and can act in RT with that user's authority.\n\n\nThis issue was fixed in version 5.0.11 and 6.0.4","status":"published","published":"2026-10-30T18:32:36Z","modified":"2026-10-30T18:32:45Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/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"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:14:51.443103Z"}],"nvd":[{"id":"CVE-2026-105456","description":"RTIR extends RT's HTML scrubber to allow an internal link\n      placeholder, and the extension lets through any link that merely\n      contains the placeholder, including links using the executable\n      javascript: scheme. The change applies to the whole RT instance\n      once RTIR is installed, not only to RTIR's own queues. Anyone who\n      can add HTML content to a ticket on such an instance can store\n      such a link. That includes an unauthenticated sender of HTML email\n      to the Incident Reports queue, which RTIR opens to everyone by\n      default. Script runs when a user clicks the link, in that user's\n      session, and can act in RT with that user's authority.\n\n\nThis issue was fixed in version 5.0.11 and 6.0.4","status":"published","published":"2026-10-30T16:17:37.147Z","modified":"2026-10-30T19:37:07.073Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/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-79"],"updated_at":"2026-11-02T14:13:05.268617Z"}],"osv":[{"id":"CVE-2026-105456","title":"Stored XSS via HTML scrubber rule in RTIR","description":"RTIR extends RT's HTML scrubber to allow an internal link\n      placeholder, and the extension lets through any link that merely\n      contains the placeholder, including links using the executable\n      javascript: scheme. The change applies to the whole RT instance\n      once RTIR is installed, not only to RTIR's own queues. Anyone who\n      can add HTML content to a ticket on such an instance can store\n      such a link. That includes an unauthenticated sender of HTML email\n      to the Incident Reports queue, which RTIR opens to everyone by\n      default. Script runs when a user clicks the link, in that user's\n      session, and can act in RT with that user's authority.\n\n\nThis issue was fixed in version 5.0.11 and 6.0.4","status":"published","published":"2026-10-30T15:22:07.644Z","modified":"2026-11-01T02:46:29.64555908Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:44:54.583213Z"}]}}