{"identifier":"CVE-2026-43891","cve":{"id":"CVE-2026-43891","description":"changedetection.io is a free open source web page change detection tool. Prior to 0.55.1, the vulnerability is caused by trusting attacker-controlled snapshot paths restored from backup files. The vulnerable flow starts in the backup restore logic. When a backup ZIP is restored, the application extracts the archive and copies each restored watch UUID directory directly into the live datastore using shutil.copytree(entry.path, dst_dir). This preserves attacker-controlled files inside the restored watch directory, including history.txt. After restore, the application parses history.txt in the watch history property and  returns the contents of the targeted local file. This vulnerability is fixed in 0.55.1.","published":"2026-05-12T18:17:28.493000+00:00","modified":"2026-10-26T18:10:00.173000+00:00","status":"Analyzed","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cvss_version":"3.1","affected":[{"criteria":"cpe:2.3:a:webtechnologies:changedetection:*:*:*:*:*:*:*:*","versionStartIncluding":"","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":"0.55.1"}],"weaknesses":["CWE-73"],"references":[{"url":"https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-8757-69j2-hx56","source":"security-advisories@github.com","tags":["Exploit","Mitigation","Vendor Advisory"]},{"url":"https://github.com/pocket-id/pocket-id/security/advisories/GHSA-w6p7-2fxx-4f44","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Exploit","Mitigation","Not Applicable","Vendor Advisory"]}],"kev":null,"kev_checked":true,"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-05-13T14:36:12.119506Z","id":"CVE-2026-43891","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:webtechnologies:changedetection:*:*:*:*:*:*:*:*","versionEndExcluding":"0.55.1","matchCriteriaId":"9ABB97F7-527C-49E5-9977-06AE0C451652"}]}]}],"source":"nvd","retrieved_at":"2026-10-28T10:24:46.291382+00:00","exploited":false,"kev_stale":false,"products":["webtechnologies / changedetection"],"priority":{"label":"Assess exposure and vendor guidance","reasons":["No higher-priority signal is available in the current stored evidence."]},"epss":{"probability":0.00354,"percentile":0.28922,"date":"2026-10-27","stale":false},"version_assessment":null},"news":[],"campaigns":[],"domains":[{"domain":"github.com","source_url":"https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-8757-69j2-hx56","investigate_url":"https://investigate.aeglixmind.com/#github.com"}],"arsenal_url":"https://arsenal.aeglixmind.com/?cve=CVE-2026-43891","catalog_url":"https://cves.aeglixmind.com/cve/CVE-2026-43891","research_url":"https://investigate.aeglixmind.com/research/cve/CVE-2026-43891","coverage":{"news_candidates_checked":0,"campaign_candidates_checked":0,"bounded":false,"notice":"Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence."}}