# CVE-2026-49329: Denial of service in Red Hat OpenShift Container Platform 4.14

> An unauthenticated attacker can cause denial of service in OpenShift by sending crafted Accept-Language headers that trigger excessive CPU usage.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Sep 2026
- **Updated:** 29 Oct 2026
- **Also known as:** GHSA-2mr2-j2wm-v93x

## What is CVE-2026-49329?

CVE-2026-49329 is a high-severity denial of service vulnerability in Red Hat OpenShift Container Platform 4.14, published on 1 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A flaw was found in openshift/oauth-server. The OAuth login and error page endpoints pass the unauthenticated Accept-Language header to golang.org/x/text/language.ParseAcceptLanguage() without input validation. A bypass of the CVE-2022-32149 mitigation exists: the upstream guard counts only '-' characters but the internal BCP 47 scanner aliases '_' to '-' after the guard check. An unauthenticated attacker can send a crafted Accept-Language header using '_' separators to trigger quadratic-time parsing, consuming excessive CPU and denying authentication to all cluster users.

Weakness: CWE-407 (Inefficient Algorithmic Complexity)

## Which versions are affected by CVE-2026-49329?


## How do I fix CVE-2026-49329?

No fix has been published for CVE-2026-49329 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-49329 being exploited?

There is no known exploitation of CVE-2026-49329 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-49329 and fix it if it is affected.

What it is: CVE-2026-49329 is a high-severity denial of service vulnerability in Red Hat OpenShift Container Platform 4.14, published on 1 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-49329 in the wild and no public exploit code.

Affected product: Red Hat OpenShift Container Platform 4.14. 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-2026-49329/ (Markdown: https://insights.sbomify.com/CVE-2026-49329/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-49329
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-49329
- OSV: https://osv.dev/vulnerability/CVE-2026-49329

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-49329/
Summaries are generated and may contain mistakes; the official description above is the record.