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CVE-2026-36728 fastapi-admin CVE debrief

CVE-2026-36728 is a markdown based cross-site scripting (XSS) vulnerability in the AI assistant chat function of FastapiAdmin v2.2.0. This vulnerability allows attackers to execute arbitrary web scripts or HTML via injecting a crafted payload into a chat message. The Common Vulnerability Scoring System (CVSS) score for this vulnerability is 5.4, indicating a MEDIUM severity level. The vulnerability was published on [cvePublishedAt](https://www.cve.org/CVERecord?id=CVE-2026-36728) and last modified on [cveModifiedAt](https://nvd.nist.gov/vuln/detail/CVE-2026-36728).

Vendor
fastapi-admin
Product
fastapi-admin v2.2.0
CVSS
MEDIUM 5.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-10
Advisory published
2026-06-09
Advisory updated
2026-06-10

Who should care

Users of FastapiAdmin v2.2.0 AI assistant chat function should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability is caused by improper sanitization of user input in the chat function, allowing attackers to inject malicious scripts. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Defensive priority

MEDIUM

Recommended defensive actions

  • Apply patches or updates provided by the vendor to fix the vulnerability.
  • Implement proper input validation and sanitization for user input in the chat function.
  • Monitor the chat function for suspicious activity and implement additional security measures as needed.

Evidence notes

The vulnerability is classified as CWE-79, which is a type of cross-site scripting (XSS) vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-36728 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-36728

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-36728 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-36728

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.