{"id":"CVE-2026-82520","title":"parsedmarc before 11.0.1 decompresses gzip and ZIP attachments in a single unbounded read with no limit on decompressed output size","summary":"parsedmarc before 11.0.1 decompresses gzip and ZIP attachments in a single unbounded read with no limit on decompressed output size. Because parsedmarc automatically processes incoming DMARC report emails without user interaction, an una…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-409"],"published":"2026-09-03","updated":"2026-09-24","sourceUpdated":"2026-09-24T20:43:32.537","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-82520","references":[{"url":"https://github.com/domainaware/parsedmarc/releases/tag/11.0.1","label":"disclosure@vulncheck.com"},{"url":"https://github.com/domainaware/parsedmarc/security/advisories/GHSA-43qf-f35w-2x4r","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/parsedmarc-zip-bomb-dos-via-compressed-email-attachments","label":"disclosure@vulncheck.com"},{"url":"https://github.com/domainaware/parsedmarc/security/advisories/GHSA-43qf-f35w-2x4r","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00784,"epssPercentile":0.54109,"ingestedAt":"2026-09-24T20:51:40.241Z","slug":"CVE-2026-82520","body":"## Overview\n\nparsedmarc before 11.0.1 decompresses gzip and ZIP attachments in a single unbounded read with no limit on decompressed output size. Because parsedmarc automatically processes incoming DMARC report emails without user interaction, an unauthenticated remote attacker can send a crafted email with a highly compressed attachment to the monitored mailbox, causing the parsedmarc process to allocate memory proportional to the uncompressed size and exhaust available RAM.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}