Vulnerability · Published Oct 16, 2026 · Assigned by GitHub_M

CVE-2026-102923SparkyFitness: SSRF via unvalidated custom_url in AI service settings

Medium 5.4

In plain English

A medium-severity server-side request forgery in SparkyFitness from CodeWithCJ. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.3%top 81.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

SparkyFitness is a self-hosted, AI-powered health and fitness tracker for families. Prior to 1.6.0, SparkyFitnessServer/services/chatService.ts and SparkyFitnessServer/services/labelScanService.ts do not validate destinations supplied in custom AI service settings. An authenticated user saves a custom AI service URL and invokes an affected AI flow. The user can save a custom AI service URL and trigger an outbound request. Successful exploitation can send server-side POST requests with a controlled bearer value, probe internal services, and disclose the AI system prompt. This issue is fixed in version 1.6.0.

Affected products (as reported)

Vendor	Product	Versions
CodeWithCJ	SparkyFitness	< 1.6.0

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References

https://github.com/CodeWithCJ/SparkyFitness/security/advisories/GHSA-rmxj-43xh-mcm3 x_refsource_CONFIRM
https://github.com/CodeWithCJ/SparkyFitness/commit/0b43a37003a3fbedf4e38058130460fd4707fe29 x_refsource_MISC
https://github.com/CodeWithCJ/SparkyFitness/releases/tag/v1.6.0 x_refsource_MISC