CVE-2026-108596: OpenLIT 2.1.0 Authorization Bypass via x-openlit-project-id Header

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-10 · updated 2026-10-18
Weakness: CWE-639

Description

OpenLIT 2.1.0 contains an authorization bypass vulnerability that allows authenticated users to read other projects' telemetry by supplying a forged x-openlit-project-id header. Attackers who know a victim project id and database config id can query the trace read API to obtain traces including LLM prompts and completions.

Affected products

openlit: from 2.1.0 through 2.1.0

References

https://github.com/openlit/openlit
https://github.com/openlit/openlit/blob/9938c66638666ca5d3bcb850350faa82e510924b/src/client/src/lib/telemetry-source.ts#L113-L125
https://github.com/openlit/openlit/blob/9938c66638666ca5d3bcb850350faa82e510924b/src/client/src/middleware/check-auth.ts#L22-L33
https://hackmd.io/@haind/openlit-project-context-read
https://www.vulncheck.com/advisories/openlit-2.1.0-authorization-bypass-via-x-openlit-project-id-header

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