CVE-2026-8784

MEDIUMNVD 4.24.2—
EchelonGraph scoreMEDIUM confidence

Score 4.2 from GitHub Security Advisory (severity: LOW) published 2026-05-18. NVD baseline CVSS 4.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
4.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.2Exploit: Elevated riskExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

A vulnerability was detected in npitre cramfs-tools up to 2.2. Affected is the function change_file_status of the file cramfsck.c. Performing a manipulation results in symlink following. The attack requires a local approach. The exploit is now public and may be used. The patch is named b4a3a695c9873f824907bd15659f2a6ac7667b4f. It is recommended to apply a patch to fix this issue.

CVSS v3
4.2
EG Score
4.2MEDIUMmedium confidence
EG Risk
35
EG Risk 35/100

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
Severity42% × 45%
Exploitation40% × 40%
Automatability0% × 15%
EPSS PROB
0.2%
EPSS %ILE
8th
KEV
Not listed

Published

May 18, 2026

Last Modified

May 18, 2026

Advisory Details (4)

Auto-updated May 18, 2026
🔬 Proof of concept available. No fix on record yet.
generic🟡 PoC Available

cramfs-tools `cramfsck -c -x` — Continue-on-Error Extraction Through Preexisting Root Symlink · Issue #13 · npitre/cramfs-tools · GitHub

https://github.com/npitre/cramfs-tools/issues/13#issuecomment-4306102583
generic🟡 PoC Available

cramfs-tools `cramfsck -c -x` — Continue-on-Error Extraction Through Preexisting Root Symlink · Issue #13 · npitre/cramfs-tools · GitHub

https://github.com/npitre/cramfs-tools/issues/13
generic

cramfsck: make die() actually die; introduce warn_error() for -c mode · npitre/cramfs-tools@b4a3a69 · GitHub

https://github.com/npitre/cramfs-tools/commit/b4a3a695c9873f824907bd15659f2a6ac7667b4f
generic

GitHub - npitre/cramfs-tools: Tools to create a cramfs filesystem image · GitHub

https://github.com/npitre/cramfs-tools/

Vendor Advisories for CVE-2026-8784(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 27× 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 194 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-8784?
CVE-2026-8784 is a medium vulnerability published on May 18, 2026. A vulnerability was detected in npitre cramfs-tools up to 2.2. Affected is the function changefilestatus of the file cramfsck.c. Performing a manipulation results in symlink following. The attack requires a local approach. The exploit is now public and may be used. The patch is named…
When was CVE-2026-8784 disclosed?
CVE-2026-8784 was first published on May 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8784 actively exploited?
CVE-2026-8784 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (8th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-8784?
CVE-2026-8784 has a CVSS v3 base score of 4.2 (NVD).
How do I remediate CVE-2026-8784?
No fix for CVE-2026-8784 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-8784 are linked in the Vendor Advisories panel on this page.

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