CVE-2026-70493

Signals

NVD · CVE-2026-18907 · Path Traversal in Download File Feature in com.talpa.hibrowser 2.23.1.1 on Android allows arbitrary file write via directory traversal sequences in the filenameNVD · CVE-2026-18897 · 8.8 · A vulnerability was identified in UTT HiPER 1250GW up to v3.2.7-210907-180535. The impacted element is the function strcpy of the file /goform/getOneApConfTempENVD · CVE-2026-18896 · 6.3 · A vulnerability was determined in lavkush-maurya Student-Registration-System 1.0. The affected element is an unknown function of the file /student/changepass.phNVD · CVE-2026-18895 · 8.8 · A vulnerability was found in UTT HiPER 1250GW up to 3.2.7-210907-180535. Impacted is the function strcpy of the file /goform/APSecurity_5g. Performing a manipulCISA KEV · CVE-2026-18556 · 7.4 · N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability · Added 2026-08-04 · Due 2026-08-07CISA KEV · CVE-2026-34486 · 7.5 · Apache Tomcat Missing Encryption of Sensitive Data Vulnerability · Added 2026-08-04 · Due 2026-08-07NVD · CVE-2026-18907 · Path Traversal in Download File Feature in com.talpa.hibrowser 2.23.1.1 on Android allows arbitrary file write via directory traversal sequences in the filenameNVD · CVE-2026-18897 · 8.8 · A vulnerability was identified in UTT HiPER 1250GW up to v3.2.7-210907-180535. The impacted element is the function strcpy of the file /goform/getOneApConfTempENVD · CVE-2026-18896 · 6.3 · A vulnerability was determined in lavkush-maurya Student-Registration-System 1.0. The affected element is an unknown function of the file /student/changepass.phNVD · CVE-2026-18895 · 8.8 · A vulnerability was found in UTT HiPER 1250GW up to 3.2.7-210907-180535. Impacted is the function strcpy of the file /goform/APSecurity_5g. Performing a manipulCISA KEV · CVE-2026-18556 · 7.4 · N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability · Added 2026-08-04 · Due 2026-08-07CISA KEV · CVE-2026-34486 · 7.5 · Apache Tomcat Missing Encryption of Sensitive Data Vulnerability · Added 2026-08-04 · Due 2026-08-07

CVE Database · CVE-2026-70493

CVE-2026-70493

· MEDIUMReceived

CVSS v3.1

6.5

EPSS

N/A

Published

Aug 4, 2026

Modified

Aug 4, 2026

Public PoC / Exploit

All weaponized →

No public PoC or exploit code indexed for this CVE.

Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.

Description

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, the built-in knowledge search path in backend/open_webui/tools/knowledge_fs.py and backend/open_webui/tools/builtin.py let a chat participant choose a pattern used to grep knowledge files. Patterns containing regex metacharacters were compiled with Python's backtracking re engine and run against every line of every reachable file with no time limit, so a crafted pattern such as (x|x)*y and one matching uploaded file line can pin one CPU core and block the event loop. This causes availability impact for every other user of the affected worker. This issue is fixed in 0.11.0.

CVSS Vector

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

Weaknesses (CWE)

CWE-1333

References (4)

https://github.com/open-webui/open-webui/commit/3ab2026262ef6f09810e4d235c5f9a9cb903e595

https://github.com/open-webui/open-webui/pull/27471

https://github.com/open-webui/open-webui/releases/tag/v0.11.0

https://github.com/open-webui/open-webui/security/advisories/GHSA-2f54-p244-32q6

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