CVE-2026-82290

MEDIUM 5.3

Chainlit Feedback Endpoints Missing Ownership Validation

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

Chainlit through 2.12.0 fails to validate ownership of feedback records in PUT and DELETE endpoints. Authenticated attackers can delete or modify other users' feedback by supplying arbitrary feedback identifiers, corrupting human-rating data used for model evaluation.

CWE	CWE-639
Vendor	chainlit
Product	chainlit
Published	Aug 28, 2026

Stay Ahead of the Next One

Get instant alerts for chainlit chainlit

Be the first to know when new medium vulnerabilities affecting chainlit chainlit are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Affected Versions

Chainlit / chainlit

0 ≤ 2.12.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/Chainlit/chainlit/issues/2975 github.com: https://github.com/Chainlit/chainlit github.com: https://github.com/Chainlit/chainlit/blob/190ea74239d9e84b26e7c91bc2882dd038942564/backend/chainlit/server.py vulncheck.com: https://www.vulncheck.com/advisories/chainlit-feedback-endpoints-missing-ownership-validation

Credits

🔍 George Chen