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.
CVE-2026-61455
MEDIUMPre-NVD 6.56.5—Trending — 3 sources updated this weekElevated
EchelonGraph scoreHIGH confidence
Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-10. a secondary CVSS source baseline 6.5; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: —CVSS: 6.5Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.5
- EG Score
- 6.5(high)
- EPSS
- —
- KEV
- Not listed
Published
July 10, 2026
Last Modified
July 10, 2026
Advisory Details (2)
Auto-updated Jul 10, 2026🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available
Decompression Bomb via ZipArchiver - Missing Extraction Limits · Advisory · getgrav/grav · GitHub
https://github.com/getgrav/grav/security/advisories/GHSA-928x-9mpw-8h56generic
Grav before 2.0.1 Decompression Bomb via ZipArchiver | Advisories | VulnCheck
https://www.vulncheck.com/advisories/grav-before-decompression-bomb-via-ziparchiverVendor Advisories for CVE-2026-61455(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 4× in last 7d / 4× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-11 16:46 UTCEG score recompute
- 2026-07-11 16:46 UTCGHSA enrichment
- 2026-07-10 14:43 UTCEG score recompute
- 2026-07-10 14:42 UTCMITRE cvelistV5first tracked
Frequently asked(4)
What is CVE-2026-61455?
CVE-2026-61455 is a medium vulnerability published on July 10, 2026. 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…
When was CVE-2026-61455 disclosed?
CVE-2026-61455 was first published in the National Vulnerability Database on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-61455?
CVE-2026-61455 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-61455?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-61455, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-61455
Is Your Infrastructure Affected by CVE-2026-61455?
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