CVE-2026-120235: ag-ui · Resource Consumption
Affects ag-uiSource CVE Database V5
Public exploit available · CVSS 5.3 Medium.
Data as of 1 Nov 2026, 16:28 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
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
- vuldb.com/vuln/429594 (opens in a new tab)
- vuldb.com/vuln/429594/cti (opens in a new tab)
- vuldb.com/cve/CVE-2026-120235 (opens in a new tab)
- vuldb.com/submit/1015147 (opens in a new tab)
- github.com/ag-ui-protocol/ag-ui/issues/2522 (opens in a new tab)
- github.com/ag-ui-protocol/ag-ui/pull/2627 (opens in a new tab)
- github.com/ag-ui-protocol/ag-ui/commit/9e7b2b00bce215bbf731f1e6094f63812527c432 (opens in a new tab)
- github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-10-30 (opens in a new tab)
- github.com/ag-ui-protocol/ag-ui/ (opens in a new tab)