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Advisory record · GHSA-fq34-xw6c-fphf

Fides Webserver API Rate Limiting Vulnerability in Proxied Environments

CVSS 6.3 MediumEPSS 0.0043 · 37th percentile

Published by the GitHub Advisory Database at 8 Sept 2025, 20:45 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
ethyca-fidesPyPI<2.69.12.69.1
Identifiers
GHSA-fq34-xw6c-fphf · CVE-2025-57816 · PYSEC-2026-1341
Weakness (CWE)
CWE-307 · CWE-770 · CWE-799
Tags
Published
8 Sept 2025
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Fides (ethyca-fides) versions before 2.69.1 apply built-in IP-based rate limiting to the connecting infrastructure address instead of the real client IP, and keep counters in memory per container. In deployments behind CDNs, proxies or load balancers, an attacker can exceed the intended limits or trigger limits on shared infrastructure IPs, causing 429 responses for legitimate users. Upgrade to version 2.69.1 or later; the source lists no application-level workaround, but external rate limiting at the infrastructure level (such as a WAF or API gateway) is an alternative.

Written 5 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.3 Medium 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0043, the 37th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:34 UTC First seen by agentprime
  2. 31 Oct 2026, 14:34 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.