# CVE-2026-92363: ag-ui-protocol ag-ui JSON sse_parser.cpp resource consumption

> Remote attackers can cause resource consumption via a manipulated JSON payload in the ag-ui protocol library's SSE parser.

- **Severity:** Medium 5.3 (`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:X`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Sep 2026
- **Updated:** 18 Sep 2026
- **Also known as:** GHSA-gh4c-79cj-jr5j

## What is CVE-2026-92363?

CVE-2026-92363 is a medium-severity denial of service vulnerability in ag-ui-protocol ag-ui, published on 16 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A flaw has been found in ag-ui-protocol ag-ui 1.0. Affected is an unknown function of the file src/stream/sse_parser.cpp of the component JSON Parser. Executing a manipulation can lead to resource consumption. The attack may be performed from remote. This patch is called ab6e0bc298996caac2b4b0b3ec0bd8d32a15a186. Applying a patch is advised to resolve this issue.

Weakness: CWE-404 (Improper Resource Shutdown or Release), CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2026-92363?


## How do I fix CVE-2026-92363?

No fix has been published for CVE-2026-92363 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-92363 being exploited?

There is no known exploitation of CVE-2026-92363 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-92363 and fix it if it is affected.

What it is: CVE-2026-92363 is a medium-severity denial of service vulnerability in ag-ui-protocol ag-ui, published on 16 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-92363 in the wild and no public exploit code.

Affected product: ag-ui-protocol ag-ui. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-92363/ (Markdown: https://insights.sbomify.com/CVE-2026-92363/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-92363
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-92363
- OSV: https://osv.dev/vulnerability/CVE-2026-92363

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-92363/
Summaries are generated and may contain mistakes; the official description above is the record.