{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-73639", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2026-08-13T12:51:42.912Z", "datePublished": "2026-09-17T21:18:59.207Z", "dateUpdated": "2026-09-22T18:27:56.365Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "modules": ["Imager::File::PNG"], "packageName": "Imager-File-PNG", "packageURL": "pkg:cpan/Imager-File-PNG", "programFiles": ["impng.c"], "programRoutines": [{"name": "read_direct8"}], "repo": "https://github.com/tonycoz/imager", "versions": [{"lessThan": "1.004", "status": "affected", "version": "1.003", "versionType": "custom"}]}, {"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "modules": ["Imager::File::PNG"], "packageName": "Imager", "packageURL": "pkg:cpan/Imager", "programFiles": ["PNG/impng.c"], "programRoutines": [{"name": "read_direct8"}], "repo": "https://github.com/tonycoz/imager", "versions": [{"lessThan": "1.035", "status": "affected", "version": "1.034", "versionType": "custom"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Alexander Bluhm (bluhm)"}], "descriptions": [{"lang": "en", "value": "Imager::File::PNG versions from 1.003 before 1.004 for Perl write past the end of the row buffer reading a PNG with a tRNS transparency chunk in read_direct8.\n\nWith a tRNS chunk, read_direct8() adds an alpha channel to the image it creates but still sizes the row buffer from the original channel count. libpng expands the transparency into that extra channel, so png_read_row() fills one channel more than the buffer holds, at one byte per sample, and writes width bytes past the end of the allocation. Palette images go to read_paletted() and 16-bit images to read_direct16(), which sizes its buffer from png_get_rowbytes() and allocates enough for the expanded row.\n\nThe same reader ships bundled in the Imager distribution.\n\nReading an attacker-supplied PNG through Imager->read() corrupts the heap, which can crash the process."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-09-17T21:18:59.207Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://github.com/tonycoz/imager/security/advisories/GHSA-jhx5-34j8-9g88"}, {"tags": ["patch"], "url": "https://github.com/tonycoz/imager/commit/d973bd7e8843f084e8071caa24b89545c88b1e4b.patch"}, {"tags": ["issue-tracking"], "url": "https://github.com/tonycoz/imager/pull/567"}, {"tags": ["release-notes"], "url": "https://metacpan.org/release/TONYC/Imager-File-PNG-1.004/changes"}, {"tags": ["release-notes"], "url": "https://metacpan.org/release/TONYC/Imager-1.035/changes"}], "solutions": [{"lang": "en", "value": "Upgrade to Imager-File-PNG 1.004 or later, or to Imager 1.035 or later if the bundled copy is in use."}], "source": {"discovery": "UNKNOWN"}, "timeline": [{"lang": "en", "time": "2026-08-19T00:00:00.000Z", "value": "Imager-File-PNG 1.004 and Imager 1.035 released with fix."}], "title": "Imager::File::PNG versions from 1.003 before 1.004 for Perl write past the end of the row buffer reading a PNG with a tRNS transparency chunk in read_direct8", "x_generator": {"engine": "cpansec-cna-tool 0.1"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/09/17/6"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-09-18T00:18:32.862Z"}}, {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-09-22T18:04:27.077498Z", "id": "CVE-2026-73639", "options": [{"Exploitation": "none"}, {"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": "2026-09-22T18:27:56.365Z"}}]}}

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{}