CVE-2026-101100: ag-ui · Incomplete Cleanup
Affects ag-uiSource CVE Database V5
Not known to be exploited · CVSS 5.3 Medium.
Data as of 12 Nov 2026, 23:24 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 22% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:XExploitation evidence
Disclosed: evidence found.
CVE published 28 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
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), the Metasploit, Exploit-DB and nuclei-templates index as of 13 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 version 2026-09-08 or later, which contains the official fix for this vulnerability. No other mitigations are indicated by the vendor advisory.
Description
A flaw has been found in ag-ui-protocol ag-ui up to 2026-09-07. This vulnerability affects the function FilterToolCallsMiddleware of the file sdks/typescript/packages/client/src/middleware/filter-tool-calls.ts of the component Middleware. Executing a manipulation can lead to incomplete cleanup. The attack may be launched remotely. Upgrading to version 2026-09-08 is able to resolve this issue. This patch is called c346119fe870b70f5c19738ee5119f3e1456e59d. It is suggested to upgrade the affected component.
References
- vuldb.com/vuln/410975 (opens in a new tab)
- vuldb.com/vuln/410975/cti (opens in a new tab)
- vuldb.com/cve/CVE-2026-101100 (opens in a new tab)
- vuldb.com/submit/934980 (opens in a new tab)
- github.com/ag-ui-protocol/ag-ui/issues/2443 (opens in a new tab)
- github.com/ag-ui-protocol/ag-ui/pull/2494 (opens in a new tab)
- github.com/ag-ui-protocol/ag-ui/commit/c346119fe870b70f5c19738ee5119f3e1456e59d (opens in a new tab)
- github.com/ag-ui-protocol/ag-ui/releases/tag/release/2026-09-08 (opens in a new tab)
- github.com/ag-ui-protocol/ag-ui/ (opens in a new tab)