{"id":"CVE-2026-27696","state":"PUBLISHED","title":"changedetection.io Vulnerable to Server-Side Request Forgery (SSRF) via Watch URLs","description":"changedetection.io is a free open source web page change detection tool. In versions prior to 0.54.1, changedetection.io is vulnerable to Server-Side Request Forgery (SSRF) because the URL validation function `is_safe_valid_url()` does not validate the resolved IP address of watch URLs against private, loopback, or link-local address ranges. An authenticated user (or any user when no password is configured, which is the default) can add a watch for internal network URLs. The application fetches these URLs server-side, stores the response content, and makes it viewable through the web UI — enabling full data exfiltration from internal services. Version 0.54.1 contains a fix for the issue.","publishedAt":"2026-02-25T04:16:22.764Z","updatedAt":"2026-02-25T14:51:16.695Z","severity":{"score":8.6,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["dgtlmoon changedetection.io"],"affected":[{"vendor":"dgtlmoon","product":"changedetection.io","versions":[{"version":"< 0.54.1","status":"affected"}]}],"references":["https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-3c45-4pj5-ch7m","https://github.com/dgtlmoon/changedetection.io/commit/fe7aa38c651d73fe5f41ce09855fa8f97193747b"],"weaknesses":["CWE-918"],"ingestedAt":"2026-10-29T20:11:31.369Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/27xxx/CVE-2026-27696.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-27696","state":"PUBLISHED","datePublished":"2026-02-25T04:16:22.764Z","dateUpdated":"2026-02-25T14:51:16.695Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-02-23T17:56:51.202Z"},"containers":{"cna":{"title":"changedetection.io Vulnerable to Server-Side Request Forgery (SSRF) via Watch URLs","descriptions":[{"lang":"en","value":"changedetection.io is a free open source web page change detection tool. In versions prior to 0.54.1, changedetection.io is vulnerable to Server-Side Request Forgery (SSRF) because the URL validation function `is_safe_valid_url()` does not validate the resolved IP address of watch URLs against private, loopback, or link-local address ranges. An authenticated user (or any user when no password is configured, which is the default) can add a watch for internal network URLs. The application fetches these URLs server-side, stores the response content, and makes it viewable through the web UI — enabling full data exfiltration from internal services. Version 0.54.1 contains a fix for the issue."}],"affected":[{"vendor":"dgtlmoon","product":"changedetection.io","versions":[{"version":"< 0.54.1","status":"affected"}]}],"references":[{"url":"https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-3c45-4pj5-ch7m","name":"https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-3c45-4pj5-ch7m","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/dgtlmoon/changedetection.io/commit/fe7aa38c651d73fe5f41ce09855fa8f97193747b","name":"https://github.com/dgtlmoon/changedetection.io/commit/fe7aa38c651d73fe5f41ce09855fa8f97193747b","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.6,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-02-25T04:16:22.764Z"},"source":{"advisory":"GHSA-3c45-4pj5-ch7m","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-3c45-4pj5-ch7m","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-02-25T14:51:00.509715Z","id":"CVE-2026-27696","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-02-25T14:51:16.695Z"}}]}}}