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VulnerabilityPublished Updated

CVE-2026-109292: open-webui · Information Exposure

Affects open-webuiSource CVE Database V5

0

Public exploit available · CVSS 7.6 High : upgrade to 0.11.4 as a priority.

Data as of 26 Oct 2026, 14:18 UTC

CVSS 4.0 base score
7.6High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 34% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CISA SSVC
Exploitation
Proof of concept is public or traded
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Total control over the software or total information disclosure

CISA SSVC assessment, 2026-10-15.

Patch
Available – fixed in 0.11.4
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

  1. Disclosed: evidence found.

    CVE published 12 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: evidence found.

    CISA SSVC: proof of concept public

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

Timeline

  1. CVE ID reserved

    by VulnCheck

    , 2 hours before disclosure

  2. CVE published

    on cve.org

    , t = 0

  3. CISA SSVC assessment

    proof of concept public

    , 3 days after disclosure

  4. In Threat Radar

    record ingested

    , 14 days after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA SSVC, the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade open-webui to 0.11.4.

Affected software

ProductAffectedFixed in
open-webuiopen-webuiAffected
  • >=0.6.27 <0.11.4
Fixed in
  • 0.11.4
PyPIopen-webuipkg:pypi/open-webuiOther threatsAffected
  • >=0.6.27 <0.11.4
Fixed in
  • 0.11.4

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade Open WebUI to version 0.11.4 or later, where this vulnerability is fixed. No other mitigation is indicated by the vendor advisory.

Description

Open WebUI versions from 0.6.27 up to but not including 0.11.4 have an information disclosure vulnerability that exposes user session cookies to destination servers during OAuth-mode connections. This allows operators of OpenAI-compatible connections, OpenAPI tool servers, or terminal servers to capture and replay session cookies, potentially hijacking user accounts including those with administrative privileges. The vulnerability is fixed in version 0.11.4.

References

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