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CVE-2026-61449

MEDIUM
6.5
CVSS 3.1
Description
Grav 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.

Metadata

CVE ID
CVE-2026-61449
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-07-09 14:06 UTC
Published
2026-07-15 11:25 UTC
Last updated
2026-07-15 11:25 UTC
Primary CWE
CWE-409
Improper Handling of Highly Compressed Data (Data Amplificat…
Vendor / Product
getgrav / grav
Sources
cve.org  ·  NVD

Severity & Metrics

6.5 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Affected products (1)
VendorProductPlatformVersions
getgrav grav — 0 < 2.0.2, 2.0.2
Weakness (CWE)
CWESourceDescription
CWE-409 cna Improper Handling of Highly Compressed Data (Data Amplification)
CVSS scores (2)
ScoreSeverityVersionSourceVector
7.1 HIGH 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
6.5 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
References (2)
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