CVE-2026-13218

MEDIUMPre-NVD 4.24.2—
EchelonGraph scoreHIGH 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
4.2
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.2Exploit: NoneExposed: 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(high)
EPSS
1.3%
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 21× in last 7d / 35× 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.

  1. 2026-07-06 16:41 UTCEG score recompute
  2. 2026-07-06 16:41 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-05 17:25 UTCEG score recompute
  5. 2026-07-05 17:25 UTCGHSA enrichment
  6. 2026-07-05 02:30 UTCEPSS rescore
  7. 2026-07-05 02:30 UTCEPSS rescore
  8. 2026-07-04 18:10 UTCEG score recompute
  9. 2026-07-04 18:10 UTCGHSA enrichment
  10. 2026-07-04 06:31 UTCEPSS rescore
  11. 2026-07-03 18:49 UTCEG score recompute
  12. 2026-07-03 18:49 UTCGHSA enrichment
  13. 2026-07-02 19:34 UTCEG score recompute
  14. 2026-07-02 19:34 UTCGHSA enrichment
  15. 2026-07-01 20:19 UTCEG score recompute
  16. 2026-07-01 20:19 UTCGHSA enrichment
  17. 2026-07-01 15:06 UTCEPSS rescore
  18. 2026-07-01 15:06 UTCEPSS rescore
  19. 2026-06-30 23:22 UTCEPSS rescore
  20. 2026-06-30 21:04 UTCEG score recompute
  21. 2026-06-30 21:04 UTCGHSA enrichment
  22. 2026-06-29 21:48 UTCEG score recompute
  23. 2026-06-29 21:48 UTCGHSA enrichment
  24. 2026-06-28 22:33 UTCEG score recompute
  25. 2026-06-28 22:33 UTCGHSA enrichment
Show 10 more
  1. 2026-06-28 14:07 UTCEPSS rescore
  2. 2026-06-28 04:56 UTCEPSS rescore
  3. 2026-06-28 04:56 UTCEPSS rescore
  4. 2026-06-27 23:18 UTCEG score recompute
  5. 2026-06-27 23:18 UTCGHSA enrichment
  6. 2026-06-27 03:08 UTCEPSS rescore
  7. 2026-06-27 00:03 UTCEG score recompute
  8. 2026-06-27 00:03 UTCGHSA enrichment
  9. 2026-06-26 00:48 UTCEG score recompute
  10. 2026-06-26 00:47 UTCGHSA enrichment

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 1.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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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