Thread hangs via missing interrupt expiry
Published Nov 1, 2026 · Updated Nov 1, 2026
Denial of service in AG-UI 0.0.58 and earlier allows remote attackers to hang client threads via crafted interrupt outcomes. The TypeScript client's isInterruptExpired function treats an omitted expiresAt as unexpired without a fallback timeout, leaving pending interrupts that block subsequent runs. Exploitation requires control of server-supplied RUN_FINISHED outcomes and stalls the affected thread rather than crashing the host.
Summary
What happened
Denial of service in AG-UI 0.0.58 and earlier allows remote attackers to hang client threads via crafted interrupt outcomes. The TypeScript client's isInterruptExpired function treats an omitted expiresAt as unexpired without a fallback timeout, leaving pending interrupts that block subsequent runs. Exploitation requires control of server-supplied RUN_FINISHED outcomes and stalls the affected thread rather than crashing the host.
The record
- CVE
- CVE-2026-120237
- Published
- Nov 1, 2026
- Updated
- Nov 1, 2026
- Vendor
- AG-UI Protocol
- Product
- AG-UI
- Classifications
- T1499.004
- Attack vector
- network
- Privileges
- Unavailable
Timeline
How it unfolded
- Nov 1, 2026CVE publishedPublication date reported by the CVE source.
- Nov 1, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0.0.1
- Affected versionversion=0.0.10
- Affected versionversion=0.0.11
- Affected versionversion=0.0.12
- Affected versionversion=0.0.13
- Affected versionversion=0.0.14
- Affected versionversion=0.0.15
- Affected versionversion=0.0.16
- Affected versionversion=0.0.17
- Affected versionversion=0.0.18
- Affected versionversion=0.0.19
- Affected versionversion=0.0.2
- Affected versionversion=0.0.20
- Affected versionversion=0.0.21
- Affected versionversion=0.0.22
- Affected versionversion=0.0.23
- Affected versionversion=0.0.24
- Affected versionversion=0.0.25
- Affected versionversion=0.0.26
- Affected versionversion=0.0.27
- Affected versionversion=0.0.28
- Affected versionversion=0.0.29
- Affected versionversion=0.0.3
- Affected versionversion=0.0.30
- Affected versionversion=0.0.31
- Affected versionversion=0.0.32
- Affected versionversion=0.0.33
- Affected versionversion=0.0.34
- Affected versionversion=0.0.35
- Affected versionversion=0.0.36
- Affected versionversion=0.0.37
- Affected versionversion=0.0.38
- Affected versionversion=0.0.39
- Affected versionversion=0.0.4
- Affected versionversion=0.0.40
- Affected versionversion=0.0.41
- Affected versionversion=0.0.42
- Affected versionversion=0.0.43
- Affected versionversion=0.0.44
- Affected versionversion=0.0.45
- Affected versionversion=0.0.46
- Affected versionversion=0.0.47
- Affected versionversion=0.0.48
- Affected versionversion=0.0.49
- Affected versionversion=0.0.5
- Affected versionversion=0.0.50
- Affected versionversion=0.0.51
- Affected versionversion=0.0.52
- Affected versionversion=0.0.53
- Affected versionversion=0.0.54
- Affected versionversion=0.0.55
- Affected versionversion=0.0.56
- Affected versionversion=0.0.57
- Affected versionversion=0.0.58
- Affected versionversion=0.0.6
- Affected versionversion=0.0.7
- Affected versionversion=0.0.8
- Affected versionversion=0.0.9
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
- poc_f30.mjsproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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