GHSA-m69w-p7m4-585j

Suggest an improvement
Source
https://github.com/advisories/GHSA-m69w-p7m4-585j
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-m69w-p7m4-585j/GHSA-m69w-p7m4-585j.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-m69w-p7m4-585j
Aliases
  • CVE-2026-45667
Published
2026-05-14T20:28:02Z
Modified
2026-05-19T16:15:13.941190931Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L CVSS Calculator
Summary
Open WebUI: Unauthenticated endpoint can trigger embedding generation (cost/DoS)
Details

Summary

GET /api/v1/memories/ef is accessible without authentication and executes request.app.state.EMBEDDING_FUNCTION(...). This allows any unauthenticated caller to trigger embedding generation which can lead to direct cost exposure if a paid provider is used. Code reference: backend/open_webui/routers/memories.py (@router.get("/ef") -> calls request.app.state.EMBEDDING_FUNCTION("hello world")).

Details

GET /api/v1/memories/ef is reachable without authentication and triggers request.app.state.EMBEDDING_FUNCTION("hello world"). This crosses an intended security boundary by allowing unauthenticated users to invoke potentially expensive embedding computation and/or paid upstream embedding APIs.

PoC

  1. Start Open WebUI in default configuration (no special env hardening; default ENABLE_MEMORIES is true).
  2. From an unauthenticated client (no cookies/Authorization header), call: curl -i http://<host>:<port>/api/v1/memories/ef
    1. Observe the server performs embedding generation and returns a response like:
    • HTTP 200 with JSON containing the result.

How it can be abused / attacker actions:

  • Send repeated requests to /api/v1/memories/ef to:
    • consume CPU/GPU resources (DoS)
    • generate sustained outbound usage to embedding providers if configured (cost + rate-limit exhaustion)
    • degrade latency/availability for legitimate users

Impact

If embeddings are configured to use paid/remote providers (OpenAI/Azure/etc), an attacker can generate unlimited requests and incur charges.

Resolution

Fixed in commit e5035ea31, first released in v0.8.0 (Feb 2026). The /api/v1/memories/ef route was removed entirely. It was a diagnostic/debug-style endpoint that hard-coded "hello world" through the embedding function without any authentication dependency; there was no legitimate caller that depended on it, so deletion was the cleaner fix than retrofitting auth. Users on >= 0.8.0 are not affected.

Database specific 
{
    "github_reviewed": true,
    "severity": "MODERATE",
    "nvd_published_at": "2026-05-15T22:16:56Z",
    "github_reviewed_at": "2026-05-14T20:28:02Z",
    "cwe_ids": [
        "CWE-862"
    ]
}
References

Affected packages

PyPI / open-webui

Package

Name
open-webui
View open source insights on deps.dev
Purl
pkg:pypi/open-webui

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.8.0

Affected versions

0.*
0.1.124
0.1.125
0.2.0
0.2.1
0.2.2
0.2.3
0.2.4
0.2.5
0.3.0
0.3.1
0.3.2
0.3.3
0.3.4
0.3.5
0.3.6
0.3.7
0.3.8
0.3.9
0.3.10
0.3.12
0.3.13
0.3.14
0.3.15
0.3.16
0.3.17.dev2
0.3.17.dev3
0.3.17.dev4
0.3.17.dev5
0.3.17
0.3.18
0.3.19
0.3.20
0.3.21
0.3.22
0.3.23
0.3.24
0.3.25
0.3.26
0.3.27.dev1
0.3.27.dev2
0.3.27.dev3
0.3.27
0.3.28
0.3.29
0.3.30.dev1
0.3.30.dev2
0.3.30
0.3.31.dev1
0.3.31
0.3.32
0.3.33.dev1
0.3.33
0.3.34
0.3.35
0.4.0.dev1
0.4.0.dev2
0.4.0
0.4.1
0.4.2
0.4.3
0.4.4
0.4.5
0.4.6.dev1
0.4.6
0.4.7
0.4.8
0.5.0.dev1
0.5.0.dev2
0.5.0
0.5.1
0.5.2
0.5.3.dev1
0.5.3
0.5.4
0.5.5
0.5.6
0.5.7
0.5.8
0.5.9
0.5.10
0.5.11
0.5.12
0.5.13
0.5.14
0.5.15
0.5.16
0.5.17
0.5.18
0.5.19
0.5.20
0.6.0
0.6.1
0.6.2
0.6.3
0.6.4
0.6.5
0.6.6.dev1
0.6.6
0.6.7
0.6.8
0.6.9
0.6.10
0.6.11
0.6.12
0.6.13
0.6.14
0.6.15
0.6.16
0.6.18
0.6.19
0.6.20
0.6.21
0.6.22
0.6.23
0.6.24
0.6.25
0.6.26.dev1
0.6.26
0.6.27
0.6.28
0.6.29
0.6.30
0.6.31
0.6.32
0.6.33
0.6.34
0.6.35
0.6.36
0.6.37
0.6.38
0.6.39
0.6.40
0.6.41
0.6.42
0.6.43
0.7.0
0.7.1
0.7.2

Database specific

last_known_affected_version_range 
"<= 0.7.2"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-m69w-p7m4-585j/GHSA-m69w-p7m4-585j.json"