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Critical, CVSS 9.5

Crayfish Allows Remote Code Execution via hypercube X-Islandora-Args Header

GHSA-c2p2-hgjg-9r3f

What to do

Vendor response not established. 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

  • Packagist islandora/crayfish

    Affected
    <= 4.0.0
    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
9.5 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H · score source
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

Impact What kind of vulnerability is it? Who is impacted? Remote code execution is possible in web-accessible installations of hypercube. Patches Has the problem been patched? What versions should users upgrade to? Not yet, though no patch is neccessary if your installation of the microservices is behind a firewall. See below. Workarounds Is there a way for users to fix or remediate the vulnerability without upgrading? The exploit requires making a request against Hypercube's endpoints; therefore, the ability to make use of the exploit is much reduced if the microservice is not directly accessible from the Internet, so: Prevent general access from the Internet from hitting Hypercube. Furthermore, if you've used any of the official installation methods, your Crayfish will be behind a firewall and there is no work neccessary. The webserver might be made to validate the structure of headers passed, but that would only be neccessary if you publicly exposed the endpoint. Standard security…

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

    Published from ghsa record GHSA-c2p2-hgjg-9r3f

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-c2p2-hgjg-9r3f

Advisory: Crayfish Allows Remote Code Execution via hypercube X-Islandora-Args Header
IDs: GHSA-c2p2-hgjg-9r3f
Record: https://patchnext.com/advisories/ghsa-c2p2-hgjg-9r3f (revision 1, source checked 26 Oct 2026, 14:29 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist islandora/crayfish: affected <= 4.0.0

## Suggested inspection (read-only)
- Packagist islandora/crayfish: 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 islandora/crayfish.
- 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-c2p2-hgjg-9r3f (GitHub-reviewed advisory GHSA-c2p2-hgjg-9r3f lists affected ranges: Packagist islandora/crayfish >=0 <=4.0.0)

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