CVE-2026-45576

Description

zrok copy writes attacker-controlled WebDAV paths outside the destination root

Description (MITRE) cveawg.mitre.org

Pulled from cveawg.mitre.org/api/cve/CVE-2026-45576 on 2026-10-22. Shown when MITRE's text differs from the cvelistV5 mirror.

zrok is software for sharing web services, files, and network resources. From 0.4.23 until 2.0.3, `zrok2 copy` stores attacker-controlled WebDAV or zrok drive paths such as /../outside.txt in the source inventory and passes them to FilesystemTarget.WriteStream, allowing the sync pipeline to write files outside the selected local filesystem destination root. This issue is fixed in version 2.0.3.

Overview

State

—

Assigner (CNA)

—

CVSS severity

critical

CVSS score

9.8 / 10

CVSS vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Effective score

9.8 / 10 CRITICAL source: CNA overview

CWE(s)

—

Reserved

—

Published

—

Last updated

—

Source

https://www.tenable.com/cve/CVE-2026-45576

Linked Threat

CVE-2026-45576 — CVE-2026-45576

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID

EUVD-2026-44973

Assigner

GitHub_M

Published

Jul 16, 2026, 4:45:52 PM

Updated

Jul 16, 2026, 5:13:51 PM

EUVD base score (CVSS 4.0)

8.3 / 10
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N

EUVD-reported EPSS

0.3400

Vendors

openziti

Products

zrok (0.4.23, < 2.0.3)

Aliases

GHSA-c656-jcx2-7pqj

ENISA description: zrok is software for sharing web services, files, and network resources. From 0.4.23 until 2.0.3, `zrok2 copy` stores attacker-controlled WebDAV or zrok drive paths such as /../outside.txt in the source inventory and passes them to FilesystemTarget.WriteStream, allowing the sync pipeline to write files outside the selected local filesystem destination root. This issue is fixed in version 2.0.3.

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

MITRE references (3) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

• https://github.com/openziti/zrok/commit/a5811e61589d2f804267c6de4a9056db1bdea457 x_refsource_MISC
• https://github.com/openziti/zrok/releases/tag/v2.0.3 x_refsource_MISC
• https://github.com/openziti/zrok/security/advisories/GHSA-c656-jcx2-7pqj x_refsource_CONFIRM

Web references (2)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

• https://nvd.nist.gov/vuln/detail/CVE-2026-45576 tenable:nvd.nist.gov
• https://www.cve.org/CVERecord?id=CVE-2026-45576 tenable:www.cve.org

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

• Oracle Critical Patch Update, April 2026 Security Update Review
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  web:community.ui.com

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  2026-05-26 02:59 UTC
• CISA Warns of Exploited Microsoft Defender 0-Day Flaws
  web:cyberpress.org

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  2026-05-26 02:59 UTC
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  2026-05-26 02:59 UTC
• Security Update Guide - Microsoft Security Response Center
  web:msrc.microsoft.com

  Security Update Guide - Microsoft Security Response Center

  2026-05-26 02:59 UTC
• SAP Security Patch Day - May 2026
  web:support.sap.com

  SAP security Patch Day Bulletin

  2026-05-26 02:59 UTC
• Microsoft April 2026 Patch Tuesday fixes 167 flaws, 2 zero-days
  web:www.bleepingcomputer.com

  Today is Microsoft's April 2026 Patch Tuesday with security updates for 167 flaws, including 2 zero-day vulnerabilities.

  2026-05-26 02:59 UTC
• Oracle Critical Patch Update Advisory - April 2026
  web:www.oracle.com

  This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

  2026-05-26 02:59 UTC
• Windows 11 April 2026 Update tested: What's new, improved and fixed
  web:www.windowslatest.com

  Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.

  2026-05-26 02:59 UTC
• Patch Tuesday May 2026: Security Updates & CVE Analysis
  web:zecurit.com

  Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

  2026-05-26 02:59 UTC

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