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TI-2026-68986 Aliases CVE-2026-97146GHSA-vgg9-3qc4-wv7m

Admission control bypass in Apache YuniKorn via system label forgery

Priority LOW 22CWE-290Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-290.

Summary

Apache YuniKorn from 0 before 1.10.0 lets a user bypass the checks on the user annotation by adding the label 'app=yunikorn' to a pod. Because those checks are skipped for that label, any user can set an arbitrary user info annotation, which is a CWE-290 authentication bypass by spoofing. An authenticated user with high privileges is needed for the attack, and the forged annotation can grant access to a queue the user normally cannot use, change quota usage for the queue, and bypass user-based quota tracking.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Apache YuniKorn 1.9.0 and earlier allows bypassing the check for the user annotation by setting a secondary label on the pod. If the pod has the label 'app=yunikorn' the checks limiting the user annotation content are not run. The label is used to identify the YuniKorn application itself in the deployments. The bypass allows any user to specify an arbitrary user info annotation. The arbitrary user information could allow access to a queue that the user normally would not have access to. Quota usage for the queue might be impacted if the application runs in the incorrect queue. User based quota enforcement is also based on the user annotation. User quota tracking could be side stepped even if the application runs in the correct queue. Users are recommended to upgrade to version 1.10.0, which fixes this issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00303 23rd percentileScored 2026-11-07
Fix Fixed Apache YuniKorn (Apache Software Foundation): 1.10.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache YuniKornbefore 1.10.01.10.0Patch availableCNA
  • Apache YuniKorn VendorApache Affected before 1.10.0 Fixed in 1.10.0 Patch available CNA

Remediation

Upgrade Apache YuniKorn to version 1.10.0, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA Apache YuniKorn (Apache Software Foundation) Fixed in 1.10.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apache YuniKorn 1.10.0

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2026-68971 Apache YuniKorn admission control bypass via workload updatesPriority LOW 11
    • TI-2026-68954 Apache YuniKorn LDAP group provider crashes on malformed group entryPriority LOW 11
    Show all 3 records →

Timeline

  1. 2026-10-07 Threatist record created from CVE-2026-97146
  2. 2026-10-07 Alias added: GHSA-vgg9-3qc4-wv7m
  3. 2026-10-07 Weakness changed · CISA ADP
  4. 2026-10-07 CISA SSVC decision points changed

References

Advisory 1

  • TI-2025-18529 Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT KEVCVSS 3.1CRITICAL 10.0
  • TI-2024-30292 Apache OFBiz: Confused controller-view authorization logic (forced browsing) KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-26062 Apache OFBiz: Unauthenticated endpoint could allow execution of screen rendering code KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-21190 Apache OFBiz: Path traversal leading to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-18186 Apache HugeGraph-Server: Command execution in gremlin KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-25106 Deserialization of untrusted data in Apache ActiveMQ KEVCVSS 3.1CRITICAL 10.0
See all 4053 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences