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TI-2026-83632 Aliases CVE-2026-120235GHSA-33qq-jfxc-p6qp

Uncontrolled resource consumption in ag-ui SSE parser

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 has an uncontrolled resource consumption flaw in the parseSSEStream function of its SSE parser (CWE-400). A remote attacker with low privileges can manipulate the parsed stream to consume resources, which affects availability. A public exploit has been disclosed and may be used.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Description from the CNA

A security vulnerability has been detected in ag-ui-protocol ag-ui up to 0.0.58. Affected is the function parseSSEStream of the file sdks/typescript/packages/client/src/transform/sse.ts of the component SSE Parser. The manipulation leads to resource consumption. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used. The identifier of the patch is 9e7b2b00bce215bbf731f1e6094f63812527c432. The affected component should be upgraded.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00354 29th 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. The source description names patch 9e7b2b00bce215bbf731f1e6094f63812527c432 and advises upgrading the affected component.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Timeline

  1. 2026-11-01 Threatist record created from CVE-2026-120235
  2. 2026-11-01 Alias added: GHSA-33qq-jfxc-p6qp
  3. 2026-11-02 CISA SSVC decision points changed
  4. 2026-11-02 Priority changed: LOW → MEDIUM

References

Exploit 1

Patch 3

Other 1

  • TI-2026-83626 Information disclosure in ag-ui HttpAgent client CVSS 4.0MEDIUM 6.9
  • TI-2026-83636 Uncontrolled resource consumption in ag-ui-protocol ag-ui CVSS 4.0MEDIUM 5.3
  • TI-2026-83635 Improper input validation in ag-ui-protocol ag-ui Transport Decoder 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