CVE-2026-12339 Authenticated Arbitrary File Write Vulnerability in multiple devices

A Zip Slip vulnerability in the WebUI ISP Upgrade functionality allows arbitrary file write via a crafted archive containing directory traversal sequences. An authenticated administrator may overwrite arbitrary files on the system.Successful exploitation may allow arbitrary file to be overwritten...

EUVD-2026-55700

A Zip Slip vulnerability in the WebUI ISP Upgrade functionality allows arbitrary file write via a crafted archive containing directory traversal sequences. An authenticated administrator may overwrite arbitrary files on the system.Successful exploitation may allow arbitrary file to overwrite on t...

CVE-2026-12339

Technical details are not publicly available in the provided documents for CVE-2026-12339. No vendor-confirmed impact, affected products, or remediation are specified here. Monitor for updates and refer to the CVE entry for official details.

CVE-2026-12339

A Zip Slip vulnerability in the WebUI ISP Upgrade functionality allows arbitrary file write via a crafted archive containing directory traversal sequences. An authenticated administrator may overwrite arbitrary files on the system.Successful exploitation may allow arbitrary file to overwrite on t...

open-webui (>=0.7.0, <=0.7.2) potentially affected by CVE-2026-67422 via pymdown-extensions (10.20.0)

pymdown-extensions PYPI version 10.20.0 is affected by a known vulnerability. The following packages have a transitive dependency on pymdown-extensions and may be impacted: - open-webui =0.7.0, =0.7.2 Source cves: CVE-2026-67422 Source advisory: OSV:PYSEC-2026-3654...

open-webui (0.6.41) potentially affected by CVE-2026-67422 via pymdown-extensions (10.17.2)

pymdown-extensions PYPI version 10.17.2 is affected by a known vulnerability. The following packages have a transitive dependency on pymdown-extensions and may be impacted: - open-webui 0.6.41 Source cves: CVE-2026-67422 Source advisory: OSV:PYSEC-2026-3654...

bestatic (>=0.0.34, <=0.0.36), mkdocs-techdocs-core (1.6.1) +1 more potentially affected by CVE-2026-67422 via pymdown-extensions (10.19.1)

pymdown-extensions PYPI version 10.19.1 is affected by a known vulnerability. The following packages have a transitive dependency on pymdown-extensions and may be impacted: - bestatic =0.0.34, =0.6.42, =0.6.43 Source cves: CVE-2026-67422 Source advisory: OSV:PYSEC-2026-3654...

aurapro-ui (>=3.1.0, <=3.7.4), leopath (>=0.1.3, <=0.2.1) +2 more potentially affected by CVE-2026-67422 via pymdown-extensions (10.21.0)

pymdown-extensions PYPI version 10.21.0 is affected by a known vulnerability. The following packages have a transitive dependency on pymdown-extensions and may be impacted: - aurapro-ui =3.1.0, =0.1.3, =0.4.3, =0.8.11, =0.9.6 Source cves: CVE-2026-67422 Source advisory: OSV:PYSEC-2026-3654...

Open WebUI: A folder write-collaborator can permanently delete the owner's chats by deleting a shared subfolder

SummaryA user granted write access to a shared chat folder could permanently delete chats and messages belonging to the folder's owner. Deleting a folder cascades into the owner's chats and the entire subfolder subtree, and the deletion handler required only write access on subfolders instead of...

PYSEC-2026-3647 Open WebUI: DNS Rebinding SSRF Bypass

Summary Open WebUI vetted user-supplied URLs by resolving the hostname once and rejecting private, loopback and link-local addresses, then let the HTTP client resolve that hostname again at connect time. An attacker who controls the authoritative DNS for a hostname they submit can answer with a...

Open WebUI: DNS Rebinding SSRF Bypass

SummaryOpen WebUI vetted user-supplied URLs by resolving the hostname once and rejecting private, loopback and link-local addresses, then let the HTTP client resolve that hostname again at connect time. An attacker who controls the authoritative DNS for a hostname they submit can answer with a...

Open WebUI: Cross-user file content disclosure via request-scoped direct model knowledge metadata

SummaryOpen WebUI lets a client define a model inline on a chat request instead of selecting a saved workspace model. The knowledge attached to such an inline model was used as-is, without checking that the caller can read what it points at. Any authenticated user who knows another user's file id...

PYSEC-2026-3645 Open WebUI: Any authenticated user can reach internal services and cloud metadata via NAT64-encoded URLs

Summary Open WebUI fetches user-supplied URLs on the server for RAG URL ingestion, URL-to-markdown conversion and web-search content retrieval, and decides whether a destination is allowed by asking whether its IP address is globally routable. That test operates on the literal IPv6 address and do...

PYSEC-2026-3643 Open WebUI: Cross-user file content disclosure via request-scoped direct model knowledge metadata

Summary Open WebUI lets a client define a model inline on a chat request instead of selecting a saved workspace model. The knowledge attached to such an inline model was used as-is, without checking that the caller can read what it points at. Any authenticated user who knows another user's file i...

PYSEC-2026-3641 Open WebUI: Same-origin XSS to account takeover via terminal file-preview iframe hardcoding allow-same-origin

Summary Any authenticated user with access to a terminal server could get script of their choosing to run in the Open WebUI origin itself. The HTML file preview rendered terminal-served files in an iframe whose sandbox always granted allow-same-origin alongside allow-scripts, and the file is serv...

Open WebUI: Account takeover via OAuth token exchange accepting tokens issued to any client

SummaryThe OAuth token exchange endpoint accepts a raw provider access token and validates it by calling the provider's userinfo endpoint. A userinfo endpoint reports only that a token is valid, never which OAuth client it was issued to, and the endpoint performed no audience or client check of i...

PYSEC-2026-3651 Open WebUI: Client-side SSRF via unrestricted external resource loading in Vega/Vega-Lite chart rendering

Summary Open WebUI renders vega and vega-lite fenced code blocks in chat content by building a Vega view in the viewer's browser without a restricted resource loader. Any user who can place such a block where another user will see it can make that user's browser issue attacker-chosen outbound GET...

CVE-2026-12339: Improper Limitation of a Pathname to a Restricted Directory

A Zip Slip vulnerability in the WebUI ISP Upgrade functionality allows arbitrary file write via a crafted archive containing directory traversal sequences. An authenticated administrator may overwrite arbitrary files on the system.Successful exploitation may allow arbitrary file to be overwritten...

PT-2026-69892

Name of the Vulnerable Software and Affected Versions WebUI ISP affected versions not specified Description A Zip Slip issue exists in the ISP Upgrade functionality of the WebUI. This occurs when the system fails to properly validate archives, allowing an authenticated administrator to perform...

PT-2026-76476

Summary Open WebUI lets a client define a model inline on a chat request instead of selecting a saved workspace model. The knowledge attached to such an inline model was used as-is, without checking that the caller can read what it points at. Any authenticated user who knows another user's file i...