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Apache XML Security For Java vulnerable to Infinite Loop

CVE-2013-5823GHSA-8gwc-x7mg-7p7p

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (org.apache.santuario:xmlsec 1.5.3, 1.4.8), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
not scored
EPSS
  • CVE-2013-5823: 4.73% estimated exploitation activity in the next 30 days; percentile 91.86 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Affected versions of xmlsec are subject to a denial of service vulnerability. Should a user check the signature of a message larger than 512 MB, the method expandSize(int newPos) of class org.apache.xml.security.utils.UnsyncByteArrayOutputStream goes in an endless loop. A remote attacker could use this flaw to supply crafted XML that would lead to a denial of service.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-8gwc-x7mg-7p7p

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2013-5823

Advisory: Apache XML Security For Java vulnerable to Infinite Loop
IDs: CVE-2013-5823, GHSA-8gwc-x7mg-7p7p
Record: https://patchnext.com/advisories/cve-2013-5823 (revision 1, source checked 26 Oct 2026, 16:26 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Unrated
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: org.apache.santuario:xmlsec 1.5.3, 1.4.8. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.apache.santuario:xmlsec: affected >= 1.4.0, < 1.4.8; >= 1.5.0, < 1.5.3; fixed in 1.4.8, 1.5.3

## Suggested inspection (read-only)
- Maven org.apache.santuario:xmlsec: 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 org.apache.santuario:xmlsec.
- 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://github.com/advisories/GHSA-8gwc-x7mg-7p7p (GitHub-reviewed advisory GHSA-8gwc-x7mg-7p7p lists affected ranges: Maven org.apache.santuario:xmlsec >=1.4.0 =1.5.0 <1.5.3)

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