CVE-2026-61455

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM 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: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
45
EG Risk 45/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
20th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 10, 2026

Last Modified

October 8, 2026

Advisory Details (2)

Auto-updated Jul 10, 2026
🔬 Proof of concept available. Patch available. Sources: github.
githubMentions a patch (unverified)🟡 PoC Available

Decompression Bomb via ZipArchiver - Missing Extraction Limits · Advisory · getgrav/grav · GitHub

https://github.com/getgrav/grav/security/advisories/GHSA-928x-9mpw-8h56
generic

Grav before 2.0.1 Decompression Bomb via ZipArchiver | Advisories | VulnCheck

https://www.vulncheck.com/advisories/grav-before-decompression-bomb-via-ziparchiver

Vendor 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.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
getgrav/grav0.8.0 ... 2.0.0-rc.9 (335 versions)
  • every version up to 2.0.1: fixed in 2.0.1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 40× 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.

Showing the most recent 100 of 174 total refreshes for this CVE.

  1. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-08 17:13 UTCEPSS rescore
  3. 2026-10-08 16:39 UTCEG score recompute
  4. 2026-10-08 16:39 UTCGHSA enrichment
  5. 2026-10-08 15:46 UTCEG score recompute
  6. 2026-10-08 15:46 UTCGHSA enrichment
  7. 2026-10-07 23:48 UTCEPSS rescore
  8. 2026-10-06 15:18 UTCEPSS rescore
  9. 2026-10-05 17:43 UTCEPSS rescore
  10. 2026-10-04 23:22 UTCEPSS rescore
  11. 2026-10-03 14:26 UTCEPSS rescore
  12. 2026-10-02 17:56 UTCEPSS rescore
  13. 2026-10-01 19:50 UTCEPSS rescore
  14. 2026-10-01 15:17 UTCEG score recompute
  15. 2026-10-01 15:17 UTCGHSA enrichment
  16. 2026-09-30 15:03 UTCEPSS rescore
  17. 2026-09-28 13:51 UTCEPSS rescore
  18. 2026-09-28 09:49 UTCEG score recompute
  19. 2026-09-28 09:49 UTCGHSA enrichment
  20. 2026-09-26 15:59 UTCEPSS rescore
  21. 2026-09-24 11:14 UTCEG score recompute
  22. 2026-09-24 11:14 UTCGHSA enrichment
  23. 2026-09-23 17:54 UTCEPSS rescore
  24. 2026-09-23 05:46 UTCEG score recompute
  25. 2026-09-23 05:46 UTCGHSA enrichment
Show 75 more
  1. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 05:19 UTCEG score recompute
  4. 2026-09-18 05:19 UTCGHSA enrichment
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-14 10:28 UTCEG score recompute
  8. 2026-09-14 10:28 UTCGHSA enrichment
  9. 2026-09-13 08:13 UTCEG score recompute
  10. 2026-09-13 08:13 UTCGHSA enrichment
  11. 2026-09-12 03:01 UTCEG score recompute
  12. 2026-09-12 03:01 UTCGHSA enrichment
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-11 09:37 UTCEPSS rescore
  15. 2026-09-10 09:35 UTCEPSS rescore
  16. 2026-09-08 22:01 UTCEPSS rescore
  17. 2026-09-08 02:57 UTCEG score recompute
  18. 2026-09-08 02:57 UTCGHSA enrichment
  19. 2026-09-07 16:01 UTCEPSS rescore
  20. 2026-09-06 13:47 UTCEPSS rescore
  21. 2026-09-05 21:47 UTCEG score recompute
  22. 2026-09-05 21:46 UTCGHSA enrichment
  23. 2026-09-04 05:07 UTCEPSS rescore
  24. 2026-09-02 14:12 UTCEPSS rescore
  25. 2026-09-01 13:54 UTCEPSS rescore
  26. 2026-09-01 04:40 UTCEPSS rescore
  27. 2026-08-30 19:17 UTCEPSS rescore
  28. 2026-08-30 06:27 UTCEG score recompute
  29. 2026-08-30 06:27 UTCGHSA enrichment
  30. 2026-08-30 01:22 UTCEPSS rescore
  31. 2026-08-28 21:42 UTCEPSS rescore
  32. 2026-08-27 21:41 UTCEG score recompute
  33. 2026-08-27 21:41 UTCGHSA enrichment
  34. 2026-08-27 14:25 UTCEPSS rescore
  35. 2026-08-26 14:46 UTCEPSS rescore
  36. 2026-08-26 03:39 UTCEG score recompute
  37. 2026-08-26 03:39 UTCGHSA enrichment
  38. 2026-08-25 13:49 UTCEPSS rescore
  39. 2026-08-24 23:28 UTCEG score recompute
  40. 2026-08-24 23:28 UTCGHSA enrichment
  41. 2026-08-23 21:25 UTCEG score recompute
  42. 2026-08-23 21:25 UTCGHSA enrichment
  43. 2026-08-23 00:19 UTCEPSS rescore
  44. 2026-08-22 19:20 UTCEG score recompute
  45. 2026-08-22 19:20 UTCGHSA enrichment
  46. 2026-08-21 23:49 UTCEPSS rescore
  47. 2026-08-21 17:16 UTCEG score recompute
  48. 2026-08-21 17:16 UTCGHSA enrichment
  49. 2026-08-20 22:55 UTCEPSS rescore
  50. 2026-08-20 15:13 UTCEG score recompute
  51. 2026-08-20 15:13 UTCGHSA enrichment
  52. 2026-08-19 17:04 UTCEPSS rescore
  53. 2026-08-19 12:58 UTCEG score recompute
  54. 2026-08-19 12:58 UTCGHSA enrichment
  55. 2026-08-18 13:48 UTCEPSS rescore
  56. 2026-08-18 10:53 UTCEG score recompute
  57. 2026-08-18 10:53 UTCGHSA enrichment
  58. 2026-08-17 13:47 UTCEPSS rescore
  59. 2026-08-17 08:48 UTCEG score recompute
  60. 2026-08-17 08:48 UTCGHSA enrichment
  61. 2026-08-16 14:56 UTCEPSS rescore
  62. 2026-08-16 06:45 UTCEG score recompute
  63. 2026-08-16 06:45 UTCGHSA enrichment
  64. 2026-08-15 04:42 UTCEG score recompute
  65. 2026-08-15 04:42 UTCGHSA enrichment
  66. 2026-08-15 01:30 UTCEPSS rescore
  67. 2026-08-14 02:37 UTCEG score recompute
  68. 2026-08-14 02:37 UTCGHSA enrichment
  69. 2026-08-13 22:00 UTCEPSS rescore
  70. 2026-08-13 00:34 UTCEG score recompute
  71. 2026-08-13 00:34 UTCGHSA enrichment
  72. 2026-08-12 13:51 UTCEPSS rescore
  73. 2026-08-11 22:30 UTCEG score recompute
  74. 2026-08-11 22:30 UTCGHSA enrichment
  75. 2026-08-11 00:00 UTCEPSS rescore

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Frequently asked(5)

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 on July 10, 2026, with the most recent update on October 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-61455 actively exploited?
CVE-2026-61455 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (20th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-61455?
CVE-2026-61455 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-61455?
A fix for CVE-2026-61455 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-61455 are linked in the Vendor Advisories panel on this page.

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