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CVE-2026-82290— Chainlit Feedback Endpoints Missing Ownership Validation

Quick assessment

Affected
Chainlit chainlit
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Chainlit是Chainlit组织开源的一个大模型对话界面框架。 Chainlit 2.12.0及之前版本存在授权问题漏洞，该漏洞源于未能验证PUT和DELETE端点中反馈记录的所有权，可能导致已认证攻击者通过提供任意反馈标识符删除或修改其他用户的反馈，破坏用于模型评估的人工评分数据。

CVSS 5.3 · Medium EPSS 0.34% · P27

Affected Version Matrix 1

VendorProduct Version RangeStatus
Chainlit chainlit ≤ 2.12.0 affected
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I. Basic Information for CVE-2026-82290

Vulnerability Information
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Vulnerability Title
Chainlit Feedback Endpoints Missing Ownership Validation
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
Chainlit 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Chainlit是Chainlit组织开源的一个大模型对话界面框架。 Chainlit 2.12.0及之前版本存在授权问题漏洞，该漏洞源于未能验证PUT和DELETE端点中反馈记录的所有权，可能导致已认证攻击者通过提供任意反馈标识符删除或修改其他用户的反馈，破坏用于模型评估的人工评分数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Chainlit chainlit 0 ~ 2.12.0 -

II. Public POCs for CVE-2026-82290

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III. Intelligence Information for CVE-2026-82290

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Vendor Advisories for CVE-2026-82290 (2)

Other References for CVE-2026-82290 (1)

IV. Related Vulnerabilities

Same product: chainlit
Same vendor: Chainlit
Same weakness: CWE-639