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TI-2026-26775 Aliases CVE-2026-34526GHSA-wm7j-m6jm-8797

SillyTavern: Incomplete IP validation in /api/search/visit allows SSRF via localhost and IPv6

Priority MEDIUM 56CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00217 12th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed SillyTavern (SillyTavern): 1.17.0sillytavern (npm): 1.17.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SillyTavernSillyTavernbefore 1.17.01.17.0Patch availableCNA
—sillytavern (npm)before 1.17.01.17.0Patch availableGHSA-wm7j-m6jm-8797
  • SillyTavern VendorSillyTavern Affected before 1.17.0 Fixed in 1.17.0 Patch available CNA
  • sillytavern (npm) Vendor— Affected before 1.17.0 Fixed in 1.17.0 Patch available GHSA-wm7j-m6jm-8797

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:sillytavern:sillytavern:*:*:*:*:*:node.js:*:*before 1.17.0VulnerableSillyTavern
  • cpe:2.3:a:sillytavern:sillytavern:*:*:*:*:*:node.js:*:* Versions before 1.17.0 Vulnerable ·SillyTavern

Remediation

  • Fix · CNA SillyTavern (SillyTavern) Fixed in 1.17.0
  • Fix · GHSA-wm7j-m6jm-8797 sillytavern (npm) Fixed in 1.17.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-34526
  2. 2026-10-03 Alias added: GHSA-wm7j-m6jm-8797

References

Exploit 1

Advisory 1

Other 2

  • TI-2026-26773 Path traversal in SillyTavern CVSS 3.1HIGH 8.8
  • TI-2026-26771 SillyTavern: Path traversal in `/api/chats/import` allows arbitrary file write outside intended chat directory CVSS 3.1HIGH 8.1
  • TI-2026-21254 SillyTavern has Server-Side Request Forgery (SSRF) via Asset Download Endpoint that Allows Reading Internal Services CVSS 4.0HIGH 7.1
  • TI-2026-26772 SillyTavern: Path traversal allows file existence oracle CVSS 3.1MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences