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CVE-2026-34526— SillyTavern: Incomplete IP validation in /api/search/visit allows SSRF via localhost and IPv6

Quick assessment

Affected
SillyTavern SillyTavern
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SillyTavern是SillyTavern开源的一个大语言模型的前端界面。 SillyTavern 1.17.0之前版本存在代码问题漏洞，该漏洞源于主机名检查仅匹配字面点分十进制IPv4地址，可能导致服务端请求伪造攻击。

CVSS 5.0 · Medium EPSS 0.29% · P20

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-34526

Vulnerability Information
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Vulnerability Title
SillyTavern: Incomplete IP validation in /api/search/visit allows SSRF via localhost and IPv6
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
SillyTavern 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SillyTavern是SillyTavern开源的一个大语言模型的前端界面。 SillyTavern 1.17.0之前版本存在代码问题漏洞，该漏洞源于主机名检查仅匹配字面点分十进制IPv4地址，可能导致服务端请求伪造攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
SillyTavern SillyTavern < 1.17.0 -

II. Public POCs for CVE-2026-34526

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III. Intelligence Information for CVE-2026-34526

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Vendor Advisories for CVE-2026-34526 (1)

Other References for CVE-2026-34526 (1)

Same Patch Batch · SillyTavern · 2026-04-02 · 4 CVEs total

CVE-2026-34524 8.3 HIGH SillyTavern: Path traversal in `/api/chats/export` and `/api/chats/delete` allows arbitrar
CVE-2026-34522 8.1 HIGH SillyTavern: Path traversal in `/api/chats/import` allows arbitrary file write outside int
CVE-2026-34523 5.3 MEDIUM SillyTavern: Path traversal allows file existence oracle

IV. Related Vulnerabilities

Same product: SillyTavern
Same vendor: SillyTavern
Same weakness: CWE-918

V. Comments for CVE-2026-34526

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