HOMEVULNERABILITIESCVE-2026-45385
MEDIUM

CVE-2026-45385

CWE-639Published: May 15, 2026· Updated: May 19, 2026

4.3
CVSS v3.1
EPSS:0.03%probability of exploitation in 30 daysPercentile:9.5th

Official Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, an IDOR vulnerability exists in the Channels feature of Open WebUI, allowing any channel member to modify messages sent by other members (including administrators) within the same channel. In the update_message_by_id function, for group or dm type channels, only the caller's membership in the channel is checked via the is_user_channel_member function, without verifying message ownership. This allows any channel member to modify messages sent by other members within the same channel. This vulnerability is fixed in 0.9.5.

NVD Source

Technical Analysis

CVE-2026-45385 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Affected Vendors & Products

openwebui1 product
open webui
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/open-webui/open-webui/security/advisories/GHSA-wwhq-cx22-f7vv
ADVISORYhttps://github.com/open-webui/open-webui/security/advisories/GHSA-wwhq-cx22-f7vv

All References (2)

→
https://github.com/open-webui/open-webui/security/advisories/GHSA-wwhq-cx22-f7vvExploit · Mitigation · Vendor Advisory
→
https://github.com/open-webui/open-webui/security/advisories/GHSA-wwhq-cx22-f7vvExploit · Mitigation · Vendor Advisory

Quick Facts

CVE IDCVE-2026-45385
CVSS Score4.3 / 10
SeverityMEDIUM
WeaknessCWE-639
CISA KEVNo
EPSS (30d)0.03%
Affected1 vendor
PublishedMay 15, 2026

Related CVEs (CWE-639)

CVE-2026-45552
9.9
CVE-2026-29200
9.9
CVE-2026-24178
9.8
CVE-2019-25487
9.8
CVE-2026-41267
9.8
CVE-2018-25270
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-45385 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2026-45385·NVD
CVE-2026-45385 — CVSS 4.3 MEDIUM | CTIWATCH.COM