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High, CVSS 7.7

DNSJava vulnerable to KeyTrap - Denial-of-Service Algorithmic Complexity Attacks

GHSA-crjg-w57m-rqqf

What to do

Partial vendor fix. Follow the primary source's mitigation guidance and check back for a fix.

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

  • Maven dnsjava:dnsjava

    Affected
    >= 3.5.0, < 3.6.0
    Fixed in
    3.6.0

  • Maven org.jitsi:dnssecjava

    Affected
    <= 2.0.0
    Fixed in
    no fixed version recorded

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
7.7 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N · score source
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

Impact Users using the ValidatingResolver for DNSSEC validation can run into CPU exhaustion with specially crafted DNSSEC-signed zones. Patches Users should upgrade to dnsjava v3.6.0 Workarounds Although not recommended, only using a non-validating resolver, will remove the vulnerability. References https://www.athene-center.de/en/keytrap

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

    Published from ghsa record GHSA-crjg-w57m-rqqf

Agent brief

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

# Patch Next advisory brief: GHSA-crjg-w57m-rqqf

Advisory: DNSJava vulnerable to KeyTrap - Denial-of-Service Algorithmic Complexity Attacks
IDs: GHSA-crjg-w57m-rqqf
Record: https://patchnext.com/advisories/ghsa-crjg-w57m-rqqf (revision 1, source checked 26 Oct 2026, 16:31 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Partial vendor fix; fixed versions by package: dnsjava:dnsjava 3.6.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven dnsjava:dnsjava: affected >= 3.5.0, < 3.6.0; fixed in 3.6.0
- Maven org.jitsi:dnssecjava: affected <= 2.0.0

## Suggested inspection (read-only)
- Maven dnsjava:dnsjava: check the installed version with your package manager.
- Maven org.jitsi:dnssecjava: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on dnsjava:dnsjava, org.jitsi:dnssecjava.
- 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-crjg-w57m-rqqf (GitHub-reviewed advisory GHSA-crjg-w57m-rqqf lists affected ranges: Maven dnsjava:dnsjava >=3.5.0 =0 <=2.0.0)

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