CVE-2026-116531

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{"affected": [{"affectedData": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "modules": ["HTTP::Body"], "packageName": "HTTP-Body", "packageURL": "pkg:cpan/HTTP-Body", "programFiles": ["lib/HTTP/Body.pm"], "programRoutines": [{"name": "HTTP::Body::add"}], "repo": "https://github.com/libwww-perl/HTTP-Body", "versions": [{"lessThan": "1.23_01", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "HTTP::Body versions before 1.23_01 for Perl lose track of chunk boundaries in chunked request bodies when a read ends inside a chunk.\n\nIn chunked mode, used when no content length is given, add() treats a chunk as complete once the buffer is as long as the chunk's declared size, but the buffer still holds the chunk-size line. When a read ends in the last bytes of a chunk, add() takes the chunk short and parses the leftover data as the next chunk-size line.\n\nA remote attacker can make a chunked body never complete, hanging a server that reads until the body is done, and may make it complete early, leaving the remaining bytes to be read as the next request."}], "id": "CVE-2026-116531", "lastModified": "2026-11-05T21:18:39.500", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-116531", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T21:02:43.203250Z", "version": "2.0.3"}}]}, "published": "2026-10-28T18:17:14.013", "references": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://github.com/libwww-perl/HTTP-Body/commit/5869dde9fe6d13f189a435b6583fd63fcc18677a.patch"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://metacpan.org/release/GETTY/HTTP-Body-1.24/changes"}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-130"}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "type": "Secondary"}]}

{"bugzilla": {"description": "perl-http-body: HTTP::Body: Denial of Service via improper chunked request body parsing", "id": "2563039", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2563039"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.2", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H", "status": "draft"}, "cwe": "CWE-444", "details": ["HTTP::Body versions before 1.23_01 for Perl lose track of chunk boundaries in chunked request bodies when a read ends inside a chunk.\nIn chunked mode, used when no content length is given, add() treats a chunk as complete once the buffer is as long as the chunk's declared size, but the buffer still holds the chunk-size line. When a read ends in the last bytes of a chunk, add() takes the chunk short and parses the leftover data as the next chunk-size line.\nA remote attacker can make a chunked body never complete, hanging a server that reads until the body is done, and may make it complete early, leaving the remaining bytes to be read as the next request.", "A flaw was found in HTTP::Body. A remote attacker can cause a Denial of Service (DoS) or unexpected request processing by sending specially crafted chunked HTTP requests. This issue occurs because the module fails to properly track chunk boundaries when reading chunked request bodies. As a result, the server can hang indefinitely while waiting for the request body to complete, or prematurely parse leftover data as part of a subsequent request."], "name": "CVE-2026-116531", "public_date": "2026-10-28T17:16:42Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-116531\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-116531\nhttps://github.com/libwww-perl/HTTP-Body/commit/5869dde9fe6d13f189a435b6583fd63fcc18677a.patch\nhttps://metacpan.org/release/GETTY/HTTP-Body-1.24/changes"], "statement": "This vulnerability has been rated as having an Important severity impact by Red Hat because an unauthenticated remote attacker can exploit chunk boundary parsing issues to cause a denial of service or desynchronize request pipelines. The perl-HTTP-Body package is not distributed as part of core Red Hat Enterprise Linux releases and is present only in community repositories such as EPEL. Applications and web handlers that process chunked HTTP transfer encoding using this module are exposed to remote worker process stalls.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.23_01)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "product": "http-body", "vendor": "libwww-perl"}], "created": "2026-10-28T18:45:07.233744+00:00", "updated": "2026-11-05T23:00:12.482116+00:00", "vendors": ["libwww-perl", "libwww-perl$PRODUCT$http-body"]}