{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-105456", "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "state": "PUBLISHED", "assignerShortName": "CERT-PL", "dateReserved": "2026-10-05T14:00:11.458Z", "datePublished": "2026-10-30T15:22:07.644Z", "dateUpdated": "2026-10-30T17:18:22.375Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "shortName": "CERT-PL", "dateUpdated": "2026-10-30T15:22:07.644Z"}, "title": "Stored XSS via HTML scrubber rule in RTIR", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-79", "description": "CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-592", "descriptions": [{"lang": "en", "value": "CAPEC-592 Stored XSS"}]}], "affected": [{"vendor": "Best Practical Solutions", "product": "RT for Incident Response", "repo": "https://github.com/bestpractical/rtir", "versions": [{"status": "affected", "version": "5.0.0", "lessThan": "5.0.11", "versionType": "semver"}, {"status": "affected", "version": "6.0.0", "lessThan": "6.0.4", "versionType": "semver"}], "defaultStatus": "unaffected"}], "cpeApplicability": [{"operator": "OR", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:best_practical_solutions:rt_for_incident_response:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0.0", "versionEndExcluding": "5.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:a:best_practical_solutions:rt_for_incident_response:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0.0", "versionEndExcluding": "6.0.4"}]}]}], "descriptions": [{"lang": "en", "value": "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\u00a05.0.11 and 6.0.4", "supportingMedia": [{"type": "text/html", "base64": false, "value": "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.<div><br></div><div>This issue was fixed in version&nbsp;5.0.11 and 6.0.4</div>"}]}], "tags": ["x_open-source"], "references": [{"url": "https://cert.pl/en/posts/2026/10/CVE-2026-105454", "tags": ["third-party-advisory"]}, {"url": "https://requesttracker.com/rtir/", "tags": ["product"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "subConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "subIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 5.3, "vectorString": "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"}}], "credits": [{"lang": "en", "value": "Mateusz Szymaniec (CERT.PL)", "type": "finder"}], "source": {"discovery": "INTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.3"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-105456", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-30T17:05:31.942517Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-30T17:18:22.375Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-105456", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-30T17:05:31.942517Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-30T17:08:43.011Z"}}], "cna": {"tags": ["x_open-source"], "title": "Stored XSS via HTML scrubber rule in RTIR", "source": {"discovery": "INTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "Mateusz Szymaniec (CERT.PL)"}], "impacts": [{"capecId": "CAPEC-592", "descriptions": [{"lang": "en", "value": "CAPEC-592 Stored XSS"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.3, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "PASSIVE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "LOW", "vulnIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "vulnConfidentialityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"repo": "https://github.com/bestpractical/rtir", "vendor": "Best Practical Solutions", "product": "RT for Incident Response", "versions": [{"status": "affected", "version": "5.0.0", "lessThan": "5.0.11", "versionType": "semver"}, {"status": "affected", "version": "6.0.0", "lessThan": "6.0.4", "versionType": "semver"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://cert.pl/en/posts/2026/10/CVE-2026-105454", "tags": ["third-party-advisory"]}, {"url": "https://requesttracker.com/rtir/", "tags": ["product"]}], "x_generator": {"engine": "Vulnogram 1.0.3"}, "descriptions": [{"lang": "en", "value": "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\u00a05.0.11 and 6.0.4", "supportingMedia": [{"type": "text/html", "value": "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.<div><br></div><div>This issue was fixed in version&nbsp;5.0.11 and 6.0.4</div>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')"}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:best_practical_solutions:rt_for_incident_response:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.0.11", "versionStartIncluding": "5.0.0"}, {"criteria": "cpe:2.3:a:best_practical_solutions:rt_for_incident_response:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.0.4", "versionStartIncluding": "6.0.0"}], "operator": "OR"}], "operator": "OR"}], "providerMetadata": {"orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "shortName": "CERT-PL", "dateUpdated": "2026-10-30T15:22:07.644Z"}}}, "cveMetadata": {"cveId": "CVE-2026-105456", "state": "PUBLISHED", "dateUpdated": "2026-10-30T17:18:22.375Z", "dateReserved": "2026-10-05T14:00:11.458Z", "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "datePublished": "2026-10-30T15:22:07.644Z", "assignerShortName": "CERT-PL"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "RT for Incident Response", "repo": "https://github.com/bestpractical/rtir", "vendor": "Best Practical Solutions", "versions": [{"lessThan": "5.0.11", "status": "affected", "version": "5.0.0", "versionType": "semver"}, {"lessThan": "6.0.4", "status": "affected", "version": "6.0.0", "versionType": "semver"}]}], "source": "cvd@cert.pl"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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\u00a05.0.11 and 6.0.4"}], "id": "CVE-2026-105456", "lastModified": "2026-10-30T19:37:07.073", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cvd@cert.pl", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-105456", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-30T17:05:31.942517Z", "version": "2.0.3"}}]}, "published": "2026-10-30T16:17:37.147", "references": [{"source": "cvd@cert.pl", "url": "https://cert.pl/en/posts/2026/10/CVE-2026-105454"}, {"source": "cvd@cert.pl", "url": "https://requesttracker.com/rtir/"}], "sourceIdentifier": "cvd@cert.pl", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "cvd@cert.pl", "type": "Secondary"}]}

{}

{"created": "2026-10-30T16:15:14.972797+00:00", "updated": "2026-10-30T16:15:14.972803+00:00", "vendors": []}