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VulnerabilityPublished

CVE-2026-45331: open-webui · Server-Side Request Forgery

Affects open-webuiSource GCVE Database

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Not known to be exploited · CVSS 8.5 High : upgrade to 0.9.0 soon.

Data as of 12 Nov 2026, 00:04 UTC

CVSS 3.1 base score
8.5High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (GitHub_M)CVSS 3.18.5
EPSS
0.2% chance of exploitation in 30 days – higher than 21% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.9.0
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 15 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  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

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

What to do

Upgrade open-webui to 0.9.0.

Affected software

ProductAffectedFixed in
open-webui open-webuiAffected
  • <0.9.0
Fixed in
  • 0.9.0

AI-suggested

Upgrade open-webui to version 0.9.0 or later, where the vulnerability is fixed. No additional mitigation is required once the software is updated.

Description

CVE-2026-45331 is a server-side request forgery (SSRF) vulnerability in open-webui versions prior to 0.9.0. The issue arises because the validators library used for URL validation does not properly implement private IPv6 address filtering, causing the validation function to incorrectly allow all IPv6 addresses. Additionally, IPv4-mapped IPv6 addresses and certain reserved IPv4 ranges are not blocked, enabling attackers to bypass intended network restrictions. This vulnerability is fixed in version 0.9.0.

References

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