← Vulnerability feed

Vulnerability record · CVE-2026-43888 · published 11 May 2026

CVE-2026-43888: Path traversal vulnerability

Outline is a service that allows for collaborative documentation. Prior to 1.7.0, ZipHelper.extract computes the extraction path for each entry by passing a full filesystem path through trimFileAndExt, a filename helper that calls path.basename on its input when truncating. When a zip entry's nested path is long enough to push the joined filesystem path over MAX_PATH_LENGTH (4096 bytes), trimFileAndExt silently drops all directory components and returns a bare filename. fs.createWriteStream then opens the file relative to the process working directory instead of inside the extraction sandbox, and the escaped file persists after import cleanup because cleanupExtractedData only removes the temporary extraction directory. This vulnerability is fixed in 1.7.0.

8.7 CVSS 3.1 High EPSS 0.52% · top 58.4% CWE-22 · Path traversal Deferred
8.7CVSS 3.1 base score
0.52%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Outline is a service that allows for collaborative documentation. Prior to 1.7.0, ZipHelper.extract computes the extraction path for each entry by passing a full filesystem path through trimFileAndExt, a filename helper that calls path.basename on its input when truncating. When a zip entry's nested path is long enough to push the joined filesystem path over MAX_PATH_LENGTH (4096 bytes), trimFileAndExt silently drops all directory components and returns a bare filename. fs.createWriteStream then opens the file relative to the process working directory instead of inside the extraction sandbox, and the escaped file persists after import cleanup because cleanupExtractedData only removes the temporary extraction directory. This vulnerability is fixed in 1.7.0.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H

References

LinkTags
https://github.com/outline/outline/security/advisories/GHSA-hw32-2v7j-mgqc
https://github.com/outline/outline/security/advisories/GHSA-hw32-2v7j-mgqc

Track CVE-2026-43888 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-93616Checkpoint multi-domain security management path traversal vulnerabilityA directory traversal and file upload vulnerability allows an unauthenticated attacker to upload and execute arbitrary scripts on Check Point Managem…KEVEPSS 20%10.0CVE-2026-85706GitLab CE/EE repository commits API path traversal allows unauthenticated file readGitLab CE/EE contains improper path confinement and missing authentication enforcement in the repository commits API, allowing an unauthenticated use…KEVEPSS 91%analysed5.3CVE-2026-66384JFrog Artifactory path traversal in Docker cache pathAn authenticated user can write data outside the intended Docker cache path under specific remote-repository conditions in JFrog Artifactory. The fla…KEVEPSS 0.66%analysed9.8CVE-2026-59310VMware vCenter Syslog server path traversal leads to RCEVMware vCenter's Syslog server is affected by a directory traversal flaw (CWE-22) that allows a remote, unauthenticated attacker to execute arbitrary…KEVEPSS 2.6%analysed10.0CVE-2026-48282Adobe ColdFusion path traversal leads to remote code executionColdFusion versions 2025.9, 2023.20 and earlier contain a path traversal flaw (CWE-22) that allows an unauthenticated remote attacker to reach files …KEVEPSS 42%analysed10.0CVE-2026-34909UniFi OS path traversal allows unauthenticated file accessUniFi OS devices contain a path traversal flaw (CWE-22) that lets a network-reachable attacker read files on the underlying system. Because the expos…KEVEPSS 1.8%analysed6.5CVE-2026-20262Cisco Catalyst SD-WAN Manager path traversal in file uploadCisco Catalyst SD-WAN Manager (formerly vManage) fails to properly validate user-supplied input during a file upload process, allowing path traversal…KEVEPSS 28%analysed8.4CVE-2024-1708ConnectWise ScreenConnect path traversal enabling remote code executionConnectWise ScreenConnect 23.9.7 and earlier contain a path-traversal flaw (CWE-22) that can let an attacker execute remote code or reach confidentia…KEVEPSS 95%analysed

Source: NIST National Vulnerability Database (record CVE-2026-43888), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.