{"id":"CVE-2026-48959","state":"PUBLISHED","title":"IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward","description":"IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward.\n\nfastForward() compares length $offset (the digit count of the offset, 1 to 19) against the chunk size $c instead of $offset itself, so $c shrinks from 16 KiB to 1-19 bytes per iteration.\n\nExtracting a named entry from an attacker supplied zip via IO::Uncompress::Unzip->new($zip, Name => $target) drives a per-byte read loop scaling with the entry's compressed size, up to the non-Zip64 4 GiB cap.","publishedAt":"2026-05-27T02:29:07.027Z","updatedAt":"2026-05-29T15:50:39.869Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"CPANSec","products":["PMQS IO::Uncompress::Unzip"],"affected":[{"vendor":"PMQS","product":"IO::Uncompress::Unzip","packageName":"IO-Compress","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.220","versionType":"custom"}],"collectionURL":"https://cpan.org/modules","programFiles":["lib/IO/Uncompress/Unzip.pm"],"programRoutines":[{"name":"IO::Uncompress::Unzip::fastForward"}],"repo":"https://github.com/pmqs/IO-Compress"}],"references":["https://github.com/pmqs/IO-Compress/commit/68db44076f4c1a86a2ffe53a958eac6cabaf72e2.patch","https://metacpan.org/release/PMQS/IO-Compress-2.220/changes","http://www.openwall.com/lists/oss-security/2026/05/27/2"],"weaknesses":["CWE-407"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/48xxx/CVE-2026-48959.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-48959","state":"PUBLISHED","datePublished":"2026-05-27T02:29:07.027Z","dateUpdated":"2026-05-29T15:50:39.869Z","assignerShortName":"CPANSec","assignerOrgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","dateReserved":"2026-05-26T18:09:32.365Z"},"containers":{"cna":{"title":"IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward","descriptions":[{"lang":"en","value":"IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward.\n\nfastForward() compares length $offset (the digit count of the offset, 1 to 19) against the chunk size $c instead of $offset itself, so $c shrinks from 16 KiB to 1-19 bytes per iteration.\n\nExtracting a named entry from an attacker supplied zip via IO::Uncompress::Unzip->new($zip, Name => $target) drives a per-byte read loop scaling with the entry's compressed size, up to the non-Zip64 4 GiB cap."}],"affected":[{"vendor":"PMQS","product":"IO::Uncompress::Unzip","packageName":"IO-Compress","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.220","versionType":"custom"}],"collectionURL":"https://cpan.org/modules","programFiles":["lib/IO/Uncompress/Unzip.pm"],"programRoutines":[{"name":"IO::Uncompress::Unzip::fastForward"}],"repo":"https://github.com/pmqs/IO-Compress"}],"references":[{"url":"https://github.com/pmqs/IO-Compress/commit/68db44076f4c1a86a2ffe53a958eac6cabaf72e2.patch","tags":["patch"]},{"url":"https://metacpan.org/release/PMQS/IO-Compress-2.220/changes","tags":["release-notes"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-407","description":"CWE-407 Inefficient Algorithmic Complexity","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"CPANSec","orgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","dateUpdated":"2026-05-27T02:29:07.027Z"},"solutions":[{"lang":"en","value":"Upgrade to IO-Compress 2.220 or later."}],"source":{"discovery":"UNKNOWN"},"timeline":[{"lang":"en","time":"2026-05-14T00:00:00.000Z","value":"Issue reported."},{"lang":"en","time":"2026-05-16T00:00:00.000Z","value":"Version 2.220 released."}],"x_generator":{"engine":"cpansec-cna-tool 0.1"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/05/27/2"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-05-27T07:24:56.426Z"}},{"title":"CISA ADP Vulnrichment","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"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-05-29T15:50:09.916092Z","id":"CVE-2026-48959","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-29T15:50:39.869Z"}}]}}}