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TI-2026-44054 Aliases CVE-2026-61449GHSA-8h9x-89f2-m7x3

Grav before 2.0.2 Decompression Bomb via Forged ZIP Size

Priority MEDIUM 64CWE-409Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00299 22nd percentileScored 2026-11-07
Fix Fixed grav (getgrav): 2.0.2getgrav/grav (Packagist): 2.0.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
getgravgravbefore 2.0.22.0.2Patch availableCNA
—getgrav/grav (Packagist)2.0.1 to before 2.0.22.0.2Patch availableGHSA-8h9x-89f2-m7x3
  • grav Vendorgetgrav Affected before 2.0.2 Fixed in 2.0.2 Patch available CNA
  • getgrav/grav (Packagist) Vendor— Affected 2.0.1 to before 2.0.2 Fixed in 2.0.2 Patch available GHSA-8h9x-89f2-m7x3

Remediation

  • Fix · CNA grav (getgrav) Fixed in 2.0.2
  • Fix · GHSA-8h9x-89f2-m7x3 getgrav/grav (Packagist) Fixed in 2.0.2 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-61449
  2. 2026-10-03 Alias added: GHSA-8h9x-89f2-m7x3

References

Advisory 3

Other 1

  • TI-2026-30893 Grav: Privilege Escalation via Missing Server-Side Validation of groups/access CVSS 3.1CRITICAL 9.4
  • TI-2025-28971 Cross Site Scripting vulnerability in grav v.1.7.48 and before allows an attacker to… CVSS 3.1CRITICAL 9.8
  • TI-2021-04523 Unauthenticated Arbitrary YAML Write/Update leads to Code Execution CVSS 3.1CRITICAL 9.8
  • TI-2026-50940 Grav CMS before 2.0.16 Origin Validation Bypass via Referer CVSS 4.0CRITICAL 9.3
  • TI-2026-46446 Grav before 2.0.7 Remote Code Execution via Blueprint dynamicData CVSS 4.0CRITICAL 9.3
  • TI-2021-22428 GravCMS 1.10.7 - Arbitrary YAML Write/Update (Unauthenticated) (2) CVSS 4.0CRITICAL 9.3
See all 228 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences