CVE-2026-34526
SillyTavern: Incomplete IP validation in /api/search/visit allows SSRF via localhost and IPv6
Description
SillyTavern is a locally installed user interface that allows users to interact with text generation large language models, image generation engines, and text-to-speech voice models. Prior to version 1.17.0, in src/endpoints/search.js, the hostname is checked against /^\d+\.\d+\.\d+\.\d+$/. This only matches literal dotted-quad IPv4 (e.g. 127.0.0.1, 10.0.0.1). It does not catch: localhost (hostname, not dotted-quad), [::1] (IPv6 loopback), and DNS names resolving to internal addresses (e.g. localtest.me -> 127.0.0.1). A separate port check (urlObj.port !== '') limits exploitation to services on default ports (80/443), making this lower severity than a fully unrestricted SSRF. This issue has been patched in version 1.17.0.
INFO
Published Date :
April 2, 2026, 6:16 p.m.
Last Modified :
July 24, 2026, 9:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update SillyTavern to version 1.17.0.
- Apply the security patch for SSRF.
- Verify the hostname validation is improved.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-34526.
| URL | Resource |
|---|---|
| https://github.com/SillyTavern/SillyTavern/releases/tag/1.17.0 | Release Notes |
| https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-wm7j-m6jm-8797 | Exploit Vendor Advisory |
| https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-wm7j-m6jm-8797 | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-34526 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-34526
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-34526 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-34526 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 24, 2026
Action Type Old Value New Value Added Translation Title: SillyTavern, Description: SillyTavern es una interfaz de usuario instalada localmente que permite a los usuarios interactuar con modelos de lenguaje grandes de generación de texto, motores de generación de imágenes y modelos de voz de texto a voz. Antes de la versión 1.17.0, en src/endpoints/search.js, el nombre de host se verifica contra /^\d+\.\d+\.\d+\.\d+$/. Esto solo coincide con IPv4 literal en formato de cuarteto de puntos (p. ej., 127.0.0.1, 10.0.0.1). No detecta: localhost (nombre de host, no cuarteto de puntos), [::1] (bucle invertido IPv6) y nombres DNS que resuelven a direcciones internas (p. ej., localtest.me -> 127.0.0.1). Una verificación de puerto separada (urlObj.port !== '') limita la explotación a servicios en puertos predeterminados (80/443), haciendo que esto sea de menor gravedad que un SSRF completamente sin restricciones. Este problema ha sido parcheado en la versión 1.17.0. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'SillyTavern', 'product': 'SillyTavern', 'versions': [{'status': 'affected', 'version': '< 1.17.0'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-34526', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-04-02T17:47:59.886274Z'} -
Initial Analysis by [email protected]
Apr. 13, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:sillytavern:sillytavern:*:*:*:*:*:node.js:*:* versions up to (excluding) 1.17.0 Added Reference Type GitHub, Inc.: https://github.com/SillyTavern/SillyTavern/releases/tag/1.17.0 Types: Release Notes Added Reference Type CISA-ADP: https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-wm7j-m6jm-8797 Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-wm7j-m6jm-8797 Types: Exploit, Vendor Advisory -
New CVE Received by [email protected]
Apr. 02, 2026
Action Type Old Value New Value Added Description SillyTavern is a locally installed user interface that allows users to interact with text generation large language models, image generation engines, and text-to-speech voice models. Prior to version 1.17.0, in src/endpoints/search.js, the hostname is checked against /^\d+\.\d+\.\d+\.\d+$/. This only matches literal dotted-quad IPv4 (e.g. 127.0.0.1, 10.0.0.1). It does not catch: localhost (hostname, not dotted-quad), [::1] (IPv6 loopback), and DNS names resolving to internal addresses (e.g. localtest.me -> 127.0.0.1). A separate port check (urlObj.port !== '') limits exploitation to services on default ports (80/443), making this lower severity than a fully unrestricted SSRF. This issue has been patched in version 1.17.0. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N Added CWE CWE-918 Added Reference https://github.com/SillyTavern/SillyTavern/releases/tag/1.17.0 Added Reference https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-wm7j-m6jm-8797 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 02, 2026
Action Type Old Value New Value Added Reference https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-wm7j-m6jm-8797