CVE-2026-42275

HIGHNVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 75% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.7Exploit: NoneExposed: 0

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

zrok is software for sharing web services, files, and network resources. Prior to version 2.0.2, the zrok WebDAV drive backend (davServer.Dir) restricts path traversal through lexical normalization but does not prevent symlink following. When a symbolic link inside the shared DriveRoot points to a location outside that root, remote WebDAV consumers can read files and—on shares without OS-level permission restrictions—write or overwrite files anywhere on the host filesystem accessible to the zrok process. This issue has been patched in version 2.0.2.

CVSS v3
8.7
EG Score
8.7(medium)
EG Risk
—
EPSS
25.3%
KEV
Not listed

Published

May 8, 2026

Last Modified

May 8, 2026

Advisory Details (3)

Auto-updated May 8, 2026
Patch available. Sources: github.
github Patch Available

WebDAV drive backend follows symlinks outside DriveRoot, enabling host filesystem read/write · Advisory · openziti/zrok · GitHub

https://github.com/openziti/zrok/security/advisories/GHSA-74m3-9qvm-rp9h
generic

Release v2.0.2 · openziti/zrok · GitHub

https://github.com/openziti/zrok/releases/tag/v2.0.2
generic

Merge pull request #1228 from openziti/v2.0.2_drive_symlinks · openziti/zrok@459bcfc · GitHub

https://github.com/openziti/zrok/commit/459bcfc1e121decae1b1d11c37ad94e4ed5bbf2e

Affected Packages

(2 across 1 ecosystem)
Go(2)
PackageVulnerable rangeFixed inDependents
github.com/openziti/zrok———
github.com/openziti/zrok/v2—2.0.2—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 33× 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. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:24 UTCEPSS rescore
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  8. 2026-07-16 09:53 UTCOSV refresh
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  1. 2026-06-29 14:06 UTCEPSS rescore
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  5. 2026-06-25 13:49 UTCEPSS rescore
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  8. 2026-06-23 21:33 UTCEPSS rescore
  9. 2026-06-22 14:25 UTCEPSS rescore
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  11. 2026-06-21 14:56 UTCEPSS rescore
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  25. 2026-06-10 13:22 UTCEPSS rescore
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  27. 2026-06-08 14:17 UTCEPSS rescore
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  41. 2026-05-31 22:30 UTCEPSS rescore
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  45. 2026-05-29 13:44 UTCEPSS rescore
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  47. 2026-05-28 13:44 UTCEPSS rescore
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  50. 2026-05-27 13:40 UTCEPSS rescore
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  56. 2026-05-20 22:38 UTCEPSS rescore
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  58. 2026-05-20 13:49 UTCEG score recompute
  59. 2026-05-20 11:22 UTCEPSS rescore
  60. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-42275?
CVE-2026-42275 is a high vulnerability published on May 8, 2026. zrok is software for sharing web services, files, and network resources. Prior to version 2.0.2, the zrok WebDAV drive backend (davServer.Dir) restricts path traversal through lexical normalization but does not prevent symlink following. When a symbolic link inside the shared DriveRoot points to a…
When was CVE-2026-42275 disclosed?
CVE-2026-42275 was first published in the National Vulnerability Database on May 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42275 actively exploited?
CVE-2026-42275 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 25.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42275?
CVE-2026-42275 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-42275?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42275, 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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