{"id":"GHSA-v626-428r-43p8","title":"Duplicate Advisory: Grav: Decompression-bomb size cap bypassed by forged ZIP size in ZipArchiver/Installer","summary":"Duplicate Advisory: Grav: Decompression-bomb size cap bypassed by forged ZIP size in ZipArchiver/Installer","severity":"high","cvss":6.5,"cwe":["CWE-409"],"vendor":"getgrav","product":"getgrav/grav","ecosystem":"composer","affected":["getgrav/grav = 2.0.1"],"published":"2026-07-15","updated":"2026-09-17","sourceUpdated":"2026-09-17T14:53:19Z","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-v626-428r-43p8","references":[{"url":"https://github.com/getgrav/grav/security/advisories/GHSA-8h9x-89f2-m7x3"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-61449"},{"url":"https://www.vulncheck.com/advisories/grav-before-decompression-bomb-via-forged-zip-size"},{"url":"https://github.com/advisories/GHSA-v626-428r-43p8"}],"tags":["ghsa","composer"],"ingestedAt":"2026-09-17T15:20:39.004Z","slug":"GHSA-v626-428r-43p8","body":"## Overview\n\n### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-8h9x-89f2-m7x3. This link is maintained to preserve external references.\n\n### Original Description\nGrav 2.0.1 contains a decompression-bomb size-cap bypass in ZipArchiver and GPM\\Installer. The size bound introduced in 2.0.1 sums the uncompressed size declared in each entry's ZIP central-directory header (ZipArchive::statIndex()['size']) and rejects archives exceeding system.gpm.archive.max_uncompressed_size before extraction. Because this declared size is attacker-forgeable and is not cross-checked against the actual inflated stream, a crafted archive declaring tiny per-entry sizes passes the cap while extractTo() writes the real, much larger content, filling disk or exhausting inodes. The archive must be supplied by a package source or admin upload (admin/operator trust). Fixed in 2.0.2. This is an incomplete fix for GHSA-928x-9mpw-8h56.\n\n## Affected packages\n\n- `getgrav/grav = 2.0.1`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"twilight","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}