CVE-2026-61455 json
Grav before 2.0.1 Decompression Bomb via ZipArchiver
published 2026-07-10 4 mo ago modified 2026-10-25 14 d ago also CVE-2026-61690 , GHSA-928x-9mpw-8h56 , EUVD-2026-42904
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 22%
- public exploits
- 0
- none known
Summary
Grav before 2.0.1 contains a decompression bomb vulnerability in ZipArchiver::extract() that lacks limits on uncompressed size, file count, and nesting depth. Attackers can supply a crafted ZIP archive that expands to fill available disk space, causing denial of service by exhausting storage resources.
Patch / fix
- packagist getgrav/grav 2.0.1
- getgrav grav 2.0.1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/getgrav/grav/security/advisories/GHSA-928x-9mpw-8h56 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | getgrav/grav | <2.0.1 |
2.0.1 |
Affected products
- getgrav grav
Classification
- Weakness
-
- CWE-409 Improper Handling of Highly Compressed Data (Data Amplification)
References
-
github.com
/getgrav/grav/commit/1c1003cfcab5344203d6fde1aaa1f9a4ee3413ff
web
-
github.com
/getgrav/grav/security/advisories/GHSA-928x-9mpw-8h56
vendor-advisory, exploit, web
-
vulncheck.com
/advisories/grav-before-decompression-bomb-via-ziparchiver
third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-61690
advisory
-
github.com
/getgrav/grav
package
-
github.com
/getgrav/grav/releases/tag/2.0.1
web
Sources
- CVE List CVE-2026-61455
- GitHub Advisory GHSA-928x-9mpw-8h56
- NVD CVE-2026-61455
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.