CVE-2026-13218

MEDIUMPre-NVD 4.24.2—
EchelonGraph scoreMEDIUM confidence

Score 4.2 from GitHub Security Advisory published 2026-06-26. a secondary CVSS source baseline 4.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.2Exploit: None knownExposed: 0

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

A flaw was found in KubeVirt's virt-handler network cache handling. The WriteToCachedFile function writes data to a launcher-rooted path using os.WriteFile and os.Chown without symlink protection. A user with access to the virt-launcher container can plant a symlink at the cache file path, causing virt-handler to follow it and overwrite an arbitrary host file with JSON content and change its ownership.

CVSS v3
4.2
EG Score
4.2(medium)
EG Risk
23(Track)
EG Risk 23/100SSVC: Track

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%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

June 26, 2026

Last Modified

July 6, 2026

Advisory Details (2)

Auto-updated Jun 26, 2026
Patch available. Sources: redhat.
redhat

2492654 – (CVE-2026-13218) CVE-2026-13218 kubevirt: kubevirt: symlink following in WriteToCachedFile allows host file overwrite from virt-launcher

https://bugzilla.redhat.com/show_bug.cgi?id=2492654
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-13218

Vendor Advisories for CVE-2026-13218(2)

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 15× in last 7d / 73× 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 130 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-13218?
CVE-2026-13218 is a medium vulnerability published on June 26, 2026. A flaw was found in KubeVirt's virt-handler network cache handling. The WriteToCachedFile function writes data to a launcher-rooted path using os.WriteFile and os.Chown without symlink protection. A user with access to the virt-launcher container can plant a symlink at the cache file path, causing…
When was CVE-2026-13218 disclosed?
CVE-2026-13218 was first published in the National Vulnerability Database on June 26, 2026, with the most recent update on July 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13218 actively exploited?
CVE-2026-13218 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 96.5% of all scored CVEs.
What is the CVSS score of CVE-2026-13218?
CVE-2026-13218 has a CVSS v3 base score of 4.2 (NVD).
How do I remediate CVE-2026-13218?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13218, 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

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