CVE-2025-54365 (GCVE-0-2025-54365)
Vulnerability from cvelistv5
Published
2025-07-23 22:11
Modified
2025-07-24 13:36
Severity ?
7.8 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:P
CWE
  • CWE-20 - Improper Input Validation
  • CWE-185 - Incorrect Regular Expression
Summary
fastapi-guard is a security library for FastAPI that provides middleware to control IPs, log requests, detect penetration attempts and more. In version 3.0.1, the regular expression patched to mitigate the ReDoS vulnerability by limiting the length of string fails to catch inputs that exceed this limit. This type of patch fails to detect cases in which the string representing the attributes of a <script> tag exceeds 100 characters. As a result, most of the regex patterns present in version 3.0.1 can be bypassed. This is fixed in version 3.0.2.
References
security-advisories@github.comhttps://github.com/rennf93/fastapi-guard/commit/0829292c322d33dc14ab00c5451c5c138148035a
security-advisories@github.comhttps://github.com/rennf93/fastapi-guard/commit/d9d50e8130b7b434cdc1b001b8cfd03a06729f7f
security-advisories@github.comhttps://github.com/rennf93/fastapi-guard/security/advisories/GHSA-rrf6-pxg8-684g
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/rennf93/fastapi-guard/security/advisories/GHSA-rrf6-pxg8-684g
Impacted products
Vendor Product Version
rennf93 fastapi-guard Version: >= 3.0.1, < 3.0.2
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