# CVE-2026-118271: a2ui-project a2ui data-context Resolver data-context.ts resource consumption

Status: published. Published: 2026-10-28. Updated: 2026-11-03.

A security vulnerability has been detected in a2ui-project a2ui up to 0.10.6. This impacts an unknown function of the file renderers/web_core/src/v0_9/rendering/data-context.ts of the component data-context Resolver. Such manipulation leads to resource consumption. The attack may be performed from remote. The exploit has been disclosed publicly and may be used. The name of the patch is eb314e14fabd29cfb4a74e1202afc4fe2081efa2. Applying a patch is advised to resolve this issue.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://github.com/a2ui-project/a2ui/pull/2417
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://github.com/a2ui-project/a2ui/commit/eb314e14fabd29cfb4a74e1202afc4fe2081efa2

## Affected products and versions

- a2ui-project / a2ui: 0.10.0 (affected); 0.10.1 (affected); 0.10.2 (affected); 0.10.3 (affected); 0.10.4 (affected); 0.10.5 (affected); 0.10.6 (affected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 5.3 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P; source: CNA: VulDB

- CVSS 3.1: 4.3 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C; source: CNA: VulDB

- CVSS 3.0: 4.3 (medium); CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C; source: CNA: VulDB

- CVSS 2.0: 4 (medium); AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C; source: CNA: VulDB

- CISA KEV: No listing in collected sources

- EPSS: 0.31% as of 2026-11-02; percentile 23.84%

- SSVC: exploitation poc; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-400, CWE-404

## Exploit evidence

- exploit: https://github.com/a2ui-project/a2ui/issues/2384 (CNA: VulDB)

## References

- https://vuldb.com/vuln/427569 (CNA: VulDB; vdb-entry)

- https://vuldb.com/vuln/427569/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-118271 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1015115 (CNA: VulDB; third-party-advisory)

- https://github.com/a2ui-project/a2ui/issues/2384 (CNA: VulDB; exploit, issue-tracking)

- https://github.com/a2ui-project/a2ui/pull/2417 (CNA: VulDB; issue-tracking, patch)

- https://github.com/a2ui-project/a2ui/commit/eb314e14fabd29cfb4a74e1202afc4fe2081efa2 (CNA: VulDB; patch)

- https://github.com/a2ui-project/a2ui/ (CNA: VulDB; product)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-118271; retrieved 2026-11-03; source updated 2026-11-03

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-118271; retrieved 2026-11-03; source updated Not reported

Revision: caa7c03534453bd0a614798ba4c927d3fde4b0257c29805261a9a179e0212a7e

Canonical: https://y2.dev/cve/CVE-2026-118271

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