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TI-2026-21254 Aliases CVE-2026-26286

SillyTavern has Server-Side Request Forgery (SSRF) via Asset Download Endpoint that Allows Reading Internal Services

Priority MEDIUM 64CWE-918Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. 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. In versions prior to 1.16.0, a Server-Side Request Forgery (SSRF) vulnerability in the asset download endpoint allows authenticated users to make arbitrary HTTP requests from the server and read the full response body, enabling access to internal services, cloud metadata, and private network resources. The vulnerability has been patched in the version 1.16.0 by introducing a whitelist domain check for asset download requests. It can be reviewed and customized by editing the `whitelistImportDomains` array in the `config.yaml` file.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00317 24th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed SillyTavern (SillyTavern): 1.16.0

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 1.16.01.16.0Patch availableCNA
  • SillyTavern VendorSillyTavern Affected before 1.16.0 Fixed in 1.16.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:sillytavern:sillytavern:*:*:*:*:*:node.js:*:*before 1.16.0VulnerableSillyTavern
  • cpe:2.3:a:sillytavern:sillytavern:*:*:*:*:*:node.js:*:* Versions before 1.16.0 Vulnerable ·SillyTavern

Remediation

  • Fix · CNA SillyTavern (SillyTavern) Fixed in 1.16.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-26286

References

Exploit 1

  • 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-2026-26772 SillyTavern: Path traversal allows file existence oracle CVSS 3.1MEDIUM 5.3
  • TI-2026-26775 SillyTavern: Incomplete IP validation in /api/search/visit allows SSRF via localhost and IPv6 CVSS 3.1MEDIUM 5.0

Sources

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