{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-39376", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-06T21:29:17.350Z", "datePublished": "2026-04-07T19:46:08.816Z", "dateUpdated": "2026-04-08T19:22:49.417Z"}, "containers": {"cna": {"title": "FastFeedParser has an infinite redirect loop DoS via meta-refresh chain", "problemTypes": [{"descriptions": [{"cweId": "CWE-674", "lang": "en", "description": "CWE-674: Uncontrolled Recursion", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/kagisearch/fastfeedparser/security/advisories/GHSA-4gx2-pc4f-wq37", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/kagisearch/fastfeedparser/security/advisories/GHSA-4gx2-pc4f-wq37"}], "affected": [{"vendor": "kagisearch", "product": "fastfeedparser", "versions": [{"version": "< 0.5.10", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-07T19:46:08.816Z"}, "descriptions": [{"lang": "en", "value": "FastFeedParser is a high performance RSS, Atom and RDF parser. Prior to 0.5.10, when parse() fetches a URL that returns an HTML page containing a <meta http-equiv=\"refresh\"> tag, it recursively calls itself with the redirect URL \u2014 with no depth limit, no visited-URL deduplication, and no redirect count cap. An attacker-controlled server that returns an infinite chain of HTML meta-refresh responses causes unbounded recursion, exhausting the Python call stack and crashing the process. This vulnerability can also be chained with the companion SSRF issue to reach internal network targets after bypassing the initial URL check. This vulnerability is fixed in 0.5.10."}], "source": {"advisory": "GHSA-4gx2-pc4f-wq37", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/kagisearch/fastfeedparser/security/advisories/GHSA-4gx2-pc4f-wq37", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-08T19:17:44.454321Z", "id": "CVE-2026-39376", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-08T19:22:49.417Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-39376", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-08T19:17:44.454321Z"}}}], "references": [{"url": "https://github.com/kagisearch/fastfeedparser/security/advisories/GHSA-4gx2-pc4f-wq37", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-08T19:17:58.606Z"}}], "cna": {"title": "FastFeedParser has an infinite redirect loop DoS via meta-refresh chain", "source": {"advisory": "GHSA-4gx2-pc4f-wq37", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "kagisearch", "product": "fastfeedparser", "versions": [{"status": "affected", "version": "< 0.5.10"}]}], "references": [{"url": "https://github.com/kagisearch/fastfeedparser/security/advisories/GHSA-4gx2-pc4f-wq37", "name": "https://github.com/kagisearch/fastfeedparser/security/advisories/GHSA-4gx2-pc4f-wq37", "tags": ["x_refsource_CONFIRM"]}], "descriptions": [{"lang": "en", "value": "FastFeedParser is a high performance RSS, Atom and RDF parser. Prior to 0.5.10, when parse() fetches a URL that returns an HTML page containing a <meta http-equiv=\"refresh\"> tag, it recursively calls itself with the redirect URL \u2014 with no depth limit, no visited-URL deduplication, and no redirect count cap. An attacker-controlled server that returns an infinite chain of HTML meta-refresh responses causes unbounded recursion, exhausting the Python call stack and crashing the process. This vulnerability can also be chained with the companion SSRF issue to reach internal network targets after bypassing the initial URL check. This vulnerability is fixed in 0.5.10."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-674", "description": "CWE-674: Uncontrolled Recursion"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-07T19:46:08.816Z"}}}, "cveMetadata": {"cveId": "CVE-2026-39376", "state": "PUBLISHED", "dateUpdated": "2026-04-08T19:22:49.417Z", "dateReserved": "2026-04-06T21:29:17.350Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-04-07T19:46:08.816Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "FastFeedParser is a high performance RSS, Atom and RDF parser. Prior to 0.5.10, when parse() fetches a URL that returns an HTML page containing a <meta http-equiv=\"refresh\"> tag, it recursively calls itself with the redirect URL \u2014 with no depth limit, no visited-URL deduplication, and no redirect count cap. An attacker-controlled server that returns an infinite chain of HTML meta-refresh responses causes unbounded recursion, exhausting the Python call stack and crashing the process. This vulnerability can also be chained with the companion SSRF issue to reach internal network targets after bypassing the initial URL check. This vulnerability is fixed in 0.5.10."}], "id": "CVE-2026-39376", "lastModified": "2026-04-08T21:27:00.663", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-04-07T20:16:32.450", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/kagisearch/fastfeedparser/security/advisories/GHSA-4gx2-pc4f-wq37"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/kagisearch/fastfeedparser/security/advisories/GHSA-4gx2-pc4f-wq37"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-674"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}