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Fencer Vulns
high 7.1

CVE-2026-93860 json

In OpenStack Mistral through 23.0.0, the /v2/maintenance API controller clears the request context and calls the maintenance service direct…

published 2026-10-08 31 d ago modified 2026-10-09 31 d ago also EUVD-2026-95129

cvss
7.1
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits
0
none known

Summary

In OpenStack Mistral through 23.0.0, the /v2/maintenance API controller clears the request context and calls the maintenance service directly without any policy enforcement. Any holder of a valid Mistral token, regardless of assigned role, can read and change the service's cluster-wide maintenance state. Setting the state to PAUSED stops processing of new workflow and execution objects across all tenant projects until an operator restores it.

Patch / fix

  • OpenStack Mistral 20.1.1, 21.0.1, 22.0.1
  • mistral Debian 14 23.0.0-2

debian advisories DEBIAN-CVE-2026-93860

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-93860 updated cvss 6.5

openstack-mistral: mistral: Unauthenticated-project user can trigger global maintenance mode causing cross-tenant denial of service

  • Red Hat OpenStack Platform 13 (Queens) python-mistral, openstack-mistral, python-mistral-tests, openstack-mistral-all, openstack-mistral-api, openstack-mistral-common, +3 more
    affected: workaround, no fix planned “No mitigation is currently available that meets Red Hat Product Security's standards for usability, deployment, applicability, or stability.”
  • Red Hat OpenStack Platform 16.2 python3-mistral, openstack-mistral-all, openstack-mistral-api, openstack-mistral-common, openstack-mistral-engine, openstack-mistral-executor, +2 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
31 d ago

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugs.launchpad.net https://bugs.launchpad.net/ossa/+bug/2162789 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA 4.0 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • OpenStack Mistral

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.