Savon::Model evaluates WSDL operation names as Ruby source

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

8.1 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

• CVE-2026-53510: 0.69% estimated exploitation activity in the next 30 days; percentile 52.72 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact Savon::Model generated SOAP operation methods by interpolating operation names into Ruby source passed to moduleeval. 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 .alloperations 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 .alloperations for untrusted WSDL documents. Use .operations with trusted operation names instead.

Published by the source

31 Jul 2026, 19:38 UTC

Last modified by the source

31 Jul 2026, 19:56 UTC

Source last checked

26 Oct 2026, 15:52 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-mx5j-mp4f-g8jg

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-mx5j-mp4f-g8jg

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# Patch Next advisory brief: CVE-2026-53510

Advisory: Savon::Model evaluates WSDL operation names as Ruby source
IDs: CVE-2026-53510, GHSA-mx5j-mp4f-g8jg
Record: https://patchnext.com/advisories/cve-2026-53510 (revision 2, source checked 26 Oct 2026, 15:52 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: savon 2.17.2. A vendor fix does not mean a deployment is fixed.

## Affected components
- RubyGems savon: affected >= 0.9.8, < 2.17.2; fixed in 2.17.2

## Suggested inspection (read-only)
- RubyGems savon: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on savon.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-mx5j-mp4f-g8jg (OSV record GHSA-mx5j-mp4f-g8jg lists affected ranges: RubyGems savon >=0.9.8 <2.17.2 (fixed))
- Verified: https://github.com/advisories/GHSA-mx5j-mp4f-g8jg (GitHub-reviewed advisory GHSA-mx5j-mp4f-g8jg lists affected ranges: RubyGems savon >=0.9.8 <2.17.2)

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