CVE-2026-53510: Savon Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-mx5j-mp4f-g8jg
Share
CVSS 8.1
CWE-94
Published
Advisory Summary

CVE-2026-53510 is a HIGH (CVSS 8.1) remote code execution vulnerability (CWE-94: Improper Control of Generation of Code ('Code Injection')) affecting Savon libraries in the RubyGems ecosystem. The issue involves :model evaluates wsdl operation names as ruby source. Remediation is available by upgrading affected packages to version 2.17.2.

CVE-2026-53510 at a Glance

CVE Identifier CVE-2026-53510
GHSA Identifier GHSA-mx5j-mp4f-g8jg
Severity HIGH
CVSS v3.1 Base Score 8.1
CWE Classification CWE-94: Improper Control of Generation of Code ('Code Injection')
Affected Product Savon
Package Ecosystem RubyGems
Published Date
Last Updated

Security Impact

CVSS: 8.1

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

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

How to Fix CVE-2026-53510

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

savon fixed: 2.17.2 
Upgrade savon to 2.17.2
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 savon

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-53510, inspect your project dependencies for Savon:

inspect dependencies for savon

Analyze the terminal output to locate any version of Savon in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.17.2), 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-94: Improper Control of Generation of Code ('Code Injection'), where the product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. In Savon, 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 `Savon::Model` generated SOAP operation methods by interpolating operation names into Ruby source passed to `module_eval`. An attacker who can control the operation names of a WSDL, can inject Ruby code that executes in the application process. This affects only the `.all_operations` class method provided by `Savon::Model` to automatically register all operations provided by the WSDL. Configuring `Savon::Model` with trusted operation names via `.operations` is safe. ### Patches Patched in Savon 2.17.2. Users should upgrade to 2.17.2 or later. ### Workarounds Avoid `.all_operations` for untrusted WSDL documents. Use `.operations` with trusted operation names instead.

CVE-2026-53510 Affected Savon Versions

1 component(s)
Fixed Versions:
2.17.2
Product / Package Ecosystem Affected Versions Fixed Version
savon
gem/savon
RubyGems
≥ 0.9.8
< 2.17.2
2.17.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/savonrb/savon/security/advisories/GHSA-mx5j-mp4f-g8jg
Security Fix Commit FIX COMMIT
https://github.com/savonrb/savon/commit/8f22eb543e7436f6247172c9be47e22792d375e9
Savon Source Repository REPOSITORY
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/savon/CVE-2026-53510.yml
Savon Source Repository REPOSITORY
https://github.com/savonrb/savon
Savon Release RELEASE
https://github.com/savonrb/savon/releases/tag/v2.17.2
CVE Official Record — CVE-2026-53510 CVE
https://www.cve.org/CVERecord/SearchResults?query=CVE-2026-53510

Frequently Asked Questions

What is CVE-2026-53510?
CVE-2026-53510 is a security vulnerability in Savon involving :Model evaluates WSDL operation names as Ruby source under CWE-94: Improper Control of Generation of Code ('Code Injection').
Which Savon versions are affected?
Affected versions include releases prior to 2.17.2 across affected packages: savon.
What version fixes CVE-2026-53510?
Upgrading to 2.17.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is savon affected?
Yes, savon is affected in releases prior to 2.17.2. Upgrade your dependency to 2.17.2 or later.
What is the CVSS score of CVE-2026-53510?
CVE-2026-53510 has a CVSS v3.1 base score of 8.1 (HIGH) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-53510?
CVE-2026-53510 is classified under CWE-94: Improper Control of Generation of Code ('Code Injection') (The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.).
How can I check RubyGems dependencies for CVE-2026-53510?
Run the dependency tree command: 'inspect dependencies for savon'. 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-mx5j-mp4f-g8jg",
  "modified" : "2026-07-31T19:38:25Z",
  "published" : "2026-07-31T19:38:25Z",
  "aliases" : [ "CVE-2026-53510" ],
  "summary" : "Savon::Model evaluates WSDL operation names as Ruby source",
  "details" : "### Impact\n\n`Savon::Model` generated SOAP operation methods by interpolating operation names into Ruby source passed to `module_eval`. An attacker who can control the operation names of a WSDL, can inject Ruby code that executes in the application process. This affects only the `.all_operations` class method provided by `Savon::Model` to automatically register all operations provided by the WSDL. Configuring `Savon::Model` with trusted operation names via `.operations` is safe.\n\n### Patches\n\nPatched in Savon 2.17.2.\n\nUsers should upgrade to 2.17.2 or later.\n\n### Workarounds\n\nAvoid `.all_operations` for untrusted WSDL documents. Use `.operations` with trusted operation names instead.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "savon"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.9.8"
      }, {
        "fixed" : "2.17.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/savonrb/savon/security/advisories/GHSA-mx5j-mp4f-g8jg"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/savonrb/savon/commit/8f22eb543e7436f6247172c9be47e22792d375e9"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/savon/CVE-2026-53510.yml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/savonrb/savon"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/savonrb/savon/releases/tag/v2.17.2"
  }, {
    "type" : "WEB",
    "url" : "https://www.cve.org/CVERecord/SearchResults?query=CVE-2026-53510"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-94" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-31T19:38:25Z",
    "nvd_published_at" : null
  }
}