The Patching Friars' AlmanacA calendar of CVE saints

April 24

ShittrixHoly card for shittrix, generated with AI (Claude, Anthropic) for the Lunario dei Frati Patchatori.CC BY-NC-SA 4.0 89 Shittrix XAPI MALE OLET
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Blessed Shittrix, of Unliturgical Name

Patron of hypervisors, management APIs that aged badly, and names you can't say in church.

Life

On 24 April 2026 independent researcher Jakob Wolffhechel published Shittrix, the result of a nine-week review of XAPI, the management software behind Citrix XenServer and XCP-ng. By his account, 89 input-validation problems, some dating back to around 2006, let a low-privilege delegated role reach control of the host and the whole pool. Disclosure came without an embargo, citing earlier disputes with the vendors, and at the time there were no public patches.

Prayer

O Blessed Shittrix, whose name makes altar boys blush, let our APIs check every parameter and let vendors answer soon. Amen.

How to celebrate

Celebrated by following Citrix and Vates advisories, isolating the hypervisor management network, and handing out delegated roles sparingly.

Ugly name, long job.

Technical record

Disclosed on
April 24 2026
CVE
No CVE: blessed, not yet canonized by MITRE
Product
Cloud Software Group (Citrix), Vates · XAPI (Citrix XenServer/Hypervisor, XCP-ng)

Sources: shittrix.moksha.dk

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