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VulnerabilityPublished

CVE-2026-120235: ag-ui · Resource Consumption

Affects ag-uiSource CVE Database V5

0
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Public exploit available · CVSS 5.3 Medium.

Data as of 1 Nov 2026, 16:28 UTC

CVSS 4.0 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (VulDB)CVSS 4.05.3
CNA (VulDB)CVSS 3.14.3
CNA (VulDB)CVSS 3.04.3
CNA (VulDB)CVSS 2.04.0
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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 1 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    CVSS exploit maturity: proof of concept public

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 1 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
ag-ui-protocolag-uiAffected
  • 0.0.1 – 0.0.58
58 affected builds
Fixed in–
GitHubag-ui-protocol/ag-uipkg:github/ag-ui-protocol/ag-uiOther threatsAffected
  • <=0.0.20
Fixed in–

CPE configurations (1)

  • cpe:2.3:a:ag-ui-protocol:ag-ui:*:*:*:*:*:*:*:*

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade the ag-ui-protocol ag-ui component to a version that includes the patch identified by commit 9e7b2b00bce215bbf731f1e6094f63812527c432. This patch addresses the resource consumption vulnerability in the parseSSEStream function. No other mitigations are specified.

Description

CVE-2026-120235 is a medium severity vulnerability in the ag-ui-protocol ag-ui component up to version 0.0.20. It affects the parseSSEStream function in the SSE Parser, leading to resource consumption when exploited remotely. Public exploit details have been disclosed. A patch identified by commit 9e7b2b00bce215bbf731f1e6094f63812527c432 is available, and upgrading the affected component is recommended.

References

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