CVE-2026-120234: ag-ui · Resource Consumption
Affects ag-uiSource CVE Database V5
Public exploit available · CVSS 5.3 Medium.
Data as of 1 Nov 2026, 15:58 UTC
Thin evidence
One scorer or none| CNA (VulDB) | CVSS 4.0 | 5.3 |
|---|---|---|
| CNA (VulDB) | CVSS 3.1 | 4.3 |
| CNA (VulDB) | CVSS 3.0 | 4.3 |
| CNA (VulDB) | CVSS 2.0 | 4.0 |
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:PExploitation evidence
Disclosed: evidence found.
CVE published 1 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| ag-ui-protocolag-ui | Affected
| Fixed in– |
GitHubag-ui-protocol/ag-uipkg:github/ag-ui-protocol/ag-uiOther threats | Affected
| 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
A pull request containing a fix for this vulnerability is awaiting acceptance. Users should monitor the vendor's repository for the acceptance of the fix and apply it promptly once available. No other mitigation or workaround is documented.
Description
CVE-2026-120234 is a medium severity vulnerability in ag-ui-protocol's ag-ui component up to version 0.0.20. It affects the HTTP Transport component's e.text function, allowing remote attackers to cause resource consumption. Public exploit code is available, but a fix is pending acceptance of a pull request.
References
- vuldb.com/vuln/429593 (opens in a new tab)
- vuldb.com/vuln/429593/cti (opens in a new tab)
- vuldb.com/cve/CVE-2026-120234 (opens in a new tab)
- vuldb.com/submit/1015146 (opens in a new tab)
- github.com/ag-ui-protocol/ag-ui/issues/2521 (opens in a new tab)
- github.com/ag-ui-protocol/ag-ui/pull/2698 (opens in a new tab)
- github.com/ag-ui-protocol/ag-ui/ (opens in a new tab)