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CVE-2026-26286

Sillytavern server-side request forgery (SSRF)

8.5 HIGHPublic exploitEPSS 0.32%
  1. Published19 Feb 2026

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. 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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Affected products

Sillytavern< 1.16.0

Remediation

Fixed in
Sillytavern≥ 1.16.0

References

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Frequently asked

Is CVE-2026-26286 being actively exploited?

CVE-2026-26286 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.32%.

How severe is CVE-2026-26286?

CVE-2026-26286 has a CVSS 3.1 base score of 8.5, rated high. EPSS estimates a 0.32% probability of exploitation.

Which products are affected by CVE-2026-26286?

Affected products include Sillytavern.

How do I fix CVE-2026-26286?

Upgrade affected software to a fixed version, for example Sillytavern 1.16.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-26286 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.