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TI-2026-83636 Aliases CVE-2026-120237GHSA-frhv-cjfr-w99c

Uncontrolled resource consumption in ag-ui-protocol ag-ui

Priority MEDIUM 57CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-400.

Summary

ag-ui-protocol ag-ui up to 0.0.58 contains an uncontrolled resource consumption flaw (CWE-400) in the isInterruptExpired function of its interrupt expiry handling. A remote attacker with low privileges can trigger the resource consumption with a low impact on availability, and no user interaction is needed. A public exploit has been published.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

A flaw has been found in ag-ui-protocol ag-ui up to 0.0.58. Affected by this issue is the function isInterruptExpired of the file sdks/typescript/packages/client/src/interrupts/index.ts of the component Interrupt expiry. This manipulation causes resource consumption. Remote exploitation of the attack is possible. The exploit has been published and may be used. The pull request to fix this issue awaits acceptance.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00407 35th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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
ag-ui-protocolag-ui0.0.1; 0.0.2; 0.0.3; 0.0.4; 0.0.5; 0.0.6; 0.0.7; 0.0.8; 0.0.9; 0.0.10; 0.0.11; 0.0.12; 0.0.13; 0.0.14; 0.0.15; 0.0.16; 0.0.17; 0.0.18; 0.0.19; 0.0.20; 0.0.21; 0.0.22; 0.0.23; 0.0.24; 0.0.25; 0.0.26; 0.0.27; 0.0.28; 0.0.29; 0.0.30; 0.0.31; 0.0.32; 0.0.33; 0.0.34; 0.0.35; 0.0.36; 0.0.37; 0.0.38; 0.0.39; 0.0.40; 0.0.41; 0.0.42; 0.0.43; 0.0.44; 0.0.45; 0.0.46; 0.0.47; 0.0.48; 0.0.49; 0.0.50; 0.0.51; 0.0.52; 0.0.53; 0.0.54; 0.0.55; 0.0.56; 0.0.57; 0.0.58—No fix listedCNA
  • ag-ui Vendorag-ui-protocol Affected 0.0.1; 0.0.2; 0.0.3; 0.0.4; 0.0.5; 0.0.6; 0.0.7; 0.0.8; 0.0.9; 0.0.10; 0.0.11; 0.0.12; 0.0.13; 0.0.14; 0.0.15; 0.0.16; 0.0.17; 0.0.18; 0.0.19; 0.0.20; 0.0.21; 0.0.22; 0.0.23; 0.0.24; 0.0.25; 0.0.26; 0.0.27; 0.0.28; 0.0.29; 0.0.30; 0.0.31; 0.0.32; 0.0.33; 0.0.34; 0.0.35; 0.0.36; 0.0.37; 0.0.38; 0.0.39; 0.0.40; 0.0.41; 0.0.42; 0.0.43; 0.0.44; 0.0.45; 0.0.46; 0.0.47; 0.0.48; 0.0.49; 0.0.50; 0.0.51; 0.0.52; 0.0.53; 0.0.54; 0.0.55; 0.0.56; 0.0.57; 0.0.58 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:ag-ui-protocol:ag-ui:*:*:*:*:*:*:*:*———
  • cpe:2.3:a:ag-ui-protocol:ag-ui:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

The sources list no fixed version for ag-ui. A pull request to fix this issue is awaiting acceptance.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Timeline

  1. 2026-11-01 Threatist record created from CVE-2026-120237
  2. 2026-11-01 Alias added: GHSA-frhv-cjfr-w99c
  3. 2026-11-05 CISA SSVC decision points changed
  4. 2026-11-05 Priority changed: LOW → MEDIUM

References

Exploit 1

Patch 1

Other 1

  • TI-2026-83626 Information disclosure in ag-ui HttpAgent client CVSS 4.0MEDIUM 6.9
  • TI-2026-83635 Improper input validation in ag-ui-protocol ag-ui Transport Decoder CVSS 4.0MEDIUM 5.3
  • TI-2026-83632 Uncontrolled resource consumption in ag-ui SSE parser CVSS 4.0MEDIUM 5.3
  • TI-2026-83628 Resource consumption in ag-ui-protocol ag-ui HTTP Transport CVSS 4.0MEDIUM 5.3
  • TI-2026-62298 ag-ui-protocol ag-ui SSE Frame sse.rs resource consumption CVSS 4.0MEDIUM 6.9
  • TI-2026-62299 ag-ui-protocol ag-ui JSON sse_parser.cpp resource consumption CVSS 4.0MEDIUM 5.3
See all 14 →

Sources

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