CVE-2026-33340
CriticalPublic exploitLoLLMs WEBUI has unauthenticated Server-Side Request Forgery (SSRF) in /api/proxy endpoint
Published Mar 24, 2026 · Updated Oct 8, 2026 · Also known as GHSA-mcwr-5469-pxj4
Key Facts
Patch immediately- CVE-2026-33340 is a critical-severity vulnerability (CVSS 9.1 v3.1) affecting Lollms Web Ui, lollms-webui.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 1.7% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
CVSS v3.1
9.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS (30-day exploit likelihood)
1.7%
Higher than 76.3% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
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Description
LoLLMs WEBUI provides the Web user interface for Lord of Large Language and Multi modal Systems. A critical Server-Side Request Forgery (SSRF) vulnerability has been identified in all known existing versions of lollms-webui. The @router.post("/api/proxy") endpoint allows unauthenticated attackers to force the server into making arbitrary GET requests. This can be exploited to access internal services, scan local networks, or exfiltrate sensitive cloud metadata (e.g., AWS/GCP IAM tokens). As of time of publication, no known patched versions are available.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Lollms Web UiLollms | See advisory | n/a |
| lollms-webui | >= <= 8c5dcef63d847bb3d027ec74915d8fe4afd3014e | n/a |
Timeline
Publicly disclosed
Mar 24, 2026
Last updated
Oct 8, 2026
Weakness Type
- CWE-306 Missing Authentication for Critical Function
- CWE-918 Server-Side Request Forgery (SSRF)
References
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33340.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2026-33340
- otherhttps://github.com/ParisNeo/lollms-webui/blob/8c5dcef63d847bb3d027ec74915d8fe4afd3014e/lollms/server/endpoints/lollms_apps.py#L443-L450
- otherhttps://github.com/ParisNeo/lollms-webui/security/advisories/GHSA-mcwr-5469-pxj4
FAQ
Common Questions.
LoLLMs WEBUI provides the Web user interface for Lord of Large Language and Multi modal Systems.
Affected: Lollms Web Ui; lollms-webui versions >= <= 8c5dcef63d847bb3d027ec74915d8fe4afd3014e. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
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