CVE-2025-32033: Apollo router Apollo Router Operation Limits Vulnerable Vulnerability

HIGH
Advisory Identifier: GHSA-84m6-5m72-45fp
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CVSS 7.5
CWE-190
Published
Advisory Summary

CVE-2025-32033 is a HIGH (CVSS 7.5) apollo router operation limits vulnerable vulnerability (CWE-190: Integer Overflow or Wraparound) affecting Apollo router libraries in the crates.io ecosystem. The issue involves apollo router operation limits vulnerable to bypass via integer overflow. Remediation is available by upgrading affected packages to version 1.61.2, 2.1.1.

CVE-2025-32033 at a Glance

CVE Identifier CVE-2025-32033
GHSA Identifier GHSA-84m6-5m72-45fp
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-190: Integer Overflow or Wraparound
Affected Product Apollo router
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2025-32033

To remediate this vulnerability, upgrade all affected Apollo router dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

apollo-router fixed: 1.61.2 
Upgrade apollo-router to 1.61.2
apollo-router fixed: 2.1.1 
Upgrade apollo-router to 2.1.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for apollo-router

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-32033, inspect your project dependencies for Apollo router:

inspect dependencies for apollo-router

Analyze the terminal output to locate any version of Apollo router in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.61.2), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-190: Integer Overflow or Wraparound, where the product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. this occurs when an integer value is incremented to a value that is too large to store in the associated representation. when this occurs, the value may become a very small or negative number. In Apollo router, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

# Impact ## Summary A vulnerability in Apollo Router allowed certain queries to bypass configured operation limits, specifically due to integer overflow. ## Details The operation limits plugin uses unsigned 32-bit integers to track limit counters (e.g. for a query's height). If a counter exceeded the maximum value for this data type (4,294,967,295), it wrapped around to 0, unintentionally allowing queries to bypass configured thresholds. This could occur for large queries if the payload limit were sufficiently increased, but could also occur for small queries with deeply nested and reused named fragments. ## Fix/Mitigation Logic was updated to ensure counter overflow is handled correctly and does not wrap around to 0. # Patches This has been remediated in `apollo-router` versions 1.61.2 and 2.1.1. # Workarounds The only known workaround is "Safelisting" or "Safelisting with IDs only" per [Safelisting with Persisted Queries - Apollo GraphQL Docs](https://www.apollographql.com/docs/graphos/routing/security/persisted-queries#router-security-levels). ## Acknowledgements We appreciate the efforts of the security community in identifying and improving the performance and security of operation limiting mechanisms.

CVE-2025-32033 Affected Apollo router Versions

2 component(s)
Fixed Versions:
1.61.22.1.1
Product / Package Ecosystem Affected Versions Fixed Version
apollo-router
 crates.io
< 1.61.2
1.61.2
apollo-router
 crates.io
≥ 2.0.0-alpha.0
< 2.1.1
2.1.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/apollographql/router/security/advisories/GHSA-84m6-5m72-45fp
NVD — CVE-2025-32033 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-32033
Security Fix Commit FIX COMMIT
https://github.com/apollographql/router/commit/ab6675a63174715ea6ff50881fc957831d4e9564
Security Fix Commit FIX COMMIT
https://github.com/apollographql/router/commit/bba032e183b861348a466d3123c7137a1ae18952
Apollo router Source Repository REPOSITORY
https://github.com/apollographql/router

Frequently Asked Questions

What is CVE-2025-32033?
CVE-2025-32033 is a security vulnerability in Apollo router involving Apollo Router Operation Limits Vulnerable to Bypass via Integer Overflow under CWE-190: Integer Overflow or Wraparound.
Which Apollo router versions are affected?
Affected versions include releases prior to 1.61.2, 2.1.1 across affected packages: apollo-router.
What version fixes CVE-2025-32033?
Upgrading to 1.61.2, 2.1.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is apollo-router affected?
Yes, apollo-router is affected in releases prior to 1.61.2, 2.1.1. Upgrade your dependency to 1.61.2, 2.1.1 or later.
What is the CVSS score of CVE-2025-32033?
CVE-2025-32033 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2025-32033?
CVE-2025-32033 is classified under CWE-190: Integer Overflow or Wraparound (The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.).
How can I check crates.io dependencies for CVE-2025-32033?
Run the dependency tree command: 'inspect dependencies for apollo-router'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-84m6-5m72-45fp",
  "modified" : "2025-04-08T17:50:40Z",
  "published" : "2025-04-07T18:59:21Z",
  "aliases" : [ "CVE-2025-32033" ],
  "summary" : "Apollo Router Operation Limits Vulnerable to Bypass via Integer Overflow",
  "details" : "# Impact\n\n## Summary\n\nA vulnerability in Apollo Router allowed certain queries to bypass configured operation limits, specifically due to integer overflow.\n\n## Details\n\nThe operation limits plugin uses unsigned 32-bit integers to track limit counters (e.g. for a query's height). If a counter exceeded the maximum value for this data type (4,294,967,295), it wrapped around to 0, unintentionally allowing queries to bypass configured thresholds. This could occur for large queries if the payload limit were sufficiently increased, but could also occur for small queries with deeply nested and reused named fragments.\n\n## Fix/Mitigation\n\nLogic was updated to ensure counter overflow is handled correctly and does not wrap around to 0.\n\n# Patches\n\nThis has been remediated in `apollo-router` versions 1.61.2 and 2.1.1.\n\n# Workarounds\n\nThe only known workaround is \"Safelisting\" or \"Safelisting with IDs only\" per [Safelisting with Persisted Queries - Apollo GraphQL Docs](https://www.apollographql.com/docs/graphos/routing/security/persisted-queries#router-security-levels).\n\n## Acknowledgements\n\nWe appreciate the efforts of the security community in identifying and improving the performance and security of operation limiting mechanisms.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "apollo-router"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.61.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "apollo-router"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0-alpha.0"
      }, {
        "fixed" : "2.1.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/apollographql/router/security/advisories/GHSA-84m6-5m72-45fp"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-32033"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apollographql/router/commit/ab6675a63174715ea6ff50881fc957831d4e9564"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apollographql/router/commit/bba032e183b861348a466d3123c7137a1ae18952"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apollographql/router"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-190" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-04-07T18:59:21Z",
    "nvd_published_at" : "2025-04-07T21:15:43Z"
  }
}