TI-2026-81674 Aliases CVE-2026-118276 GHSA-5gqh-669g-4hvg

Uncontrolled resource consumption in a2ui expression parser

MEDIUM 56CWE-400Published 2026-10-28 · Updated 2026-11-02

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Passive
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

The a2ui project a2ui versions up to and including 0.10.6 contain a flaw in the formatString function of the expression parser in the Parser component. The flaw causes uncontrolled resource consumption (CWE-400). A remote attacker with low privileges can trigger it, and a user must interact with the application. A public exploit has been disclosed.

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

Description from the CNA

A vulnerability was determined in a2ui-project a2ui up to 0.10.6. This vulnerability affects the function formatString of the file renderers/web_core/src/v0_9/basic_catalog/expressions/expression_parser.ts of the component Parser. This manipulation causes resource consumption. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized. Patch name: 1f71d1aac1b145ef57c7526f9e0cff316f5934e2. Applying a patch is the recommended action to fix this issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00239 15th 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

Vendor	Product	Affected versions	Fixed in	Status	Source
a2ui-project	a2ui	0.10.0; 0.10.1; 0.10.2; 0.10.3; 0.10.4; 0.10.5; 0.10.6	—	No fix listed	CNA

a2ui Vendora2ui-project Affected 0.10.0; 0.10.1; 0.10.2; 0.10.3; 0.10.4; 0.10.5; 0.10.6 Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:a2ui-project:a2ui::::::::	—	—	—

cpe:2.3:a:a2ui-project:a2ui:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

The sources list no fixed version for a2ui. Applying the patch with commit 1f71d1aac1b145ef57c7526f9e0cff316f5934e2 is the recommended action according to the source description.

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

Timeline

2026-10-28 Threatist record created from CVE-2026-118276
2026-10-28 Alias added: GHSA-5gqh-669g-4hvg
2026-11-02 CISA SSVC decision points changed
2026-11-02 Priority changed: LOW → MEDIUM

References

Exploit 1

https://github.com/a2ui-project/a2ui/issues/2389

Patch 2

Other 1

https://github.com/a2ui-project/a2ui/

TI-2026-81673 Uncontrolled resource consumption in a2ui Resolver CVSS 4.0MEDIUM 6.9
TI-2026-81667 Uncontrolled resource consumption in a2ui Binder component CVSS 4.0MEDIUM 5.3
TI-2026-81657 Resource consumption in a2ui-project a2ui DataModel.set CVSS 4.0MEDIUM 5.3
TI-2026-81656 Error message exposes information in a2ui-project a2ui CVSS 4.0MEDIUM 5.3
TI-2026-81638 Uncontrolled resource consumption in a2ui data-context Resolver CVSS 4.0MEDIUM 5.3
TI-2026-62216 a2ui-project a2ui Basic Catalog safe_regex.ts redos CVSS 4.0MEDIUM 6.9

See all 14 →

Sources

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