MediumCVE-2026-118272

    a2ui-project a2ui Error data-context.ts DataContext.dispatchExpressionError information exposure (CVE-2026-118272)

    Published Last modified Sources: CVE.org

    What is affected, what to do

    A vulnerability was detected in a2ui-project a2ui up to 0.10.6. Affected is the function DataContext.dispatchExpressionError of the file renderers/web_core/src/v0_9/rendering/data-context.ts of the component Error Handler.

    An exploit is publicly available. The available sources name no fixed version. Check the vendor guidance in the references below.

    Affected
    • A2ui eq 0.10.0..0.10.0
    • A2ui eq 0.10.1..0.10.1
    • A2ui eq 0.10.2..0.10.2
    • A2ui eq 0.10.3..0.10.3
    • A2ui eq 0.10.4..0.10.4
    • A2ui eq 0.10.5..0.10.5
    • A2ui eq 0.10.6..0.10.6

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    5.3

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: Vendor (CNA), CVSS v4

    4.3

    CVSS v3

    Severity Medium on the scale from 0 to 10.

    Source: CVE.org

    —

    EPSS score

    No value is available for this vulnerability.

    Show all metrics
    Severity
    Medium
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    56.50 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    PoC (publicly reported)
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    5.3 Methodology
    CVSS v3

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    4.3
    CVSS v4

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    5.3
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    —
    Published
    CWE

    CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.

    Read in glossary
    CWE-209, CWE-200

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    Description

    A vulnerability was detected in a2ui-project a2ui up to 0.10.6. Affected is the function DataContext.dispatchExpressionError of the file renderers/web_core/src/v0_9/rendering/data-context.ts of the component Error Handler. Performing a manipulation results in information exposure through error message. It is possible to initiate the attack remotely. The exploit is now public and may be used. The patch is named 8f149a1c7b0ce1fa8e93ac3adfa5fda960faeb01. It is suggested to install a patch to address this issue.

    Source: cvelistv5, NVD (NIST)

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    Affected versionsFixed in
    a2ui-projecta2ui
    • 0.10.3
    • 0.10.4
    • 0.10.0
    • 0.10.6
    • 0.10.2
    • 0.10.1
    • 0.10.5
    • —
    • —
    • —
    • —
    • —
    • —
    • —

    Vendors and products

    Weakness classes (CWE)

    • CWE-209Generation of Error Message Containing Sensitive Information

      Base

      The product generates an error message that includes sensitive information about its environment, users, or associated data.

      Entry at MITRE CWE-209

    • CWE-200Exposure of Sensitive Information to an Unauthorized Actor

      Class

      The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

      Entry at MITRE CWE-200

    Public exploit references

    Publicly reported proof-of-concepts, exploit modules and detection templates for this vulnerability. NEOSEC links to the original sources only and does not provide any exploit code.

    Public exploit references
    Reference tagged as exploitgithub.com (opens in a new tab)PoC (publicly reported)reported, not verified—

    References & sources

    • github.coma2ui-project/a2uiProduct
    • github.coma2ui-project/a2ui/commit/8f149a1c7b0ce1fa8e93ac3adfa5fda960faeb…Patch
    • github.coma2ui-project/a2ui/issues/2385Exploit, Issue tracking
    • github.coma2ui-project/a2ui/pull/2429Issue tracking, Patch
    • vuldb.comCVE-2026-118272 | CVE Analysis and ReportThird-party advisory
    • vuldb.comSubmit #1015116 | a2ui-project a2ui <=0.10.6 CWE-209Third-party advisory
    • vuldb.comVDB-427570 | a2ui-project a2ui Error data-context.ts DataContext.dispatchExpressionError information exposureVulnerability database, Technical description
    • vuldb.comVDB-427570 | CTI Indicators (IOB, IOC, TTP, IOA)signature, Permissions required

    Changes to this CVE

    Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

    1. Record modifiedCISA ADP

      CISA assessment (SSVC): exploitation: proof of concept, automatable: no

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      SSVC assessmentadded
      —
      {"id":"CVE-2026-118272","role":"CISA Coordinator","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"version":"2.0.3","timestamp":"2026-10-28T15:57:46.624255Z"}

      Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

    2. ReceivedVulDB

      CVSS V4.0: AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P

      CVSS V3.1: AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

      CVSS V2: (AV:N/AC:L/Au:S/C:P/I:N/A:N)

      Weakness type: CWE-200, CWE-209

      Description added or changed

      Show 15 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Descriptionadded
      —
      A vulnerability was detected in a2ui-project a2ui up to 0.10.6. Affected is the function DataContext.dispatchExpressionError of the file renderers/web_core/src/v0_9/rendering/data-context.ts of the component Error Handler. Performing a manipulation results in information exposure through error message. It is possible to initiate the attack remotely. The exploit is now public and may be used. The patch is named 8f149a1c7b0ce1fa8e93ac3adfa5fda960faeb01. It is suggested to install a patch to address this issue.
      CVSSadded
      —
      AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
      CVSSadded
      —
      AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
      CVSSadded
      —
      (AV:N/AC:L/Au:S/C:P/I:N/A:N)
      Weakness type (CWE)added
      —
      CWE-200
      Weakness type (CWE)added
      —
      CWE-209
      Affected versions (publisher)added
      —
      New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/118xxx/CVE-2026-118272.json">CVE-2026-118272</a>
      Referenceadded
      —
      https://github.com/a2ui-project/a2ui/
      Referenceadded
      —
      https://github.com/a2ui-project/a2ui/commit/8f149a1c7b0ce1fa8e93ac3adfa5fda960faeb01
      Referenceadded
      —
      https://github.com/a2ui-project/a2ui/issues/2385
      Referenceadded
      —
      https://github.com/a2ui-project/a2ui/pull/2429
      Referenceadded
      —
      https://vuldb.com/cve/CVE-2026-118272
      Referenceadded
      —
      https://vuldb.com/submit/1015116
      Referenceadded
      —
      https://vuldb.com/vuln/427570
      Referenceadded
      —
      https://vuldb.com/vuln/427570/cti

      Source identifier: cna@vuldb.com

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