# CVE-2026-8646: IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities

> Remote attackers can exploit HTTP request smuggling in WebSphere to bypass controls, spoof identity, escalate privileges, and expose sensitive data.

- **Severity:** High 7.4 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Jun 2026
- **Updated:** 24 Jun 2026
- **Also known as:** GHSA-gmfx-j9mc-3x8v

## What is CVE-2026-8646?

CVE-2026-8646 is a high-severity vulnerability in Ibm Websphere Application Server, published on 22 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

IBM WebSphere Application Server 9.0 and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are vulnerable to HTTP request smuggling. A remote attacker could smuggle a specially crafted request to the application server thereby allowing the attacker to bypass security controls, spoof identity, escalate privilege, and expose sensitive information.

Weakness: CWE-444 (Inconsistent Interpretation of HTTP Requests)

## Which versions are affected by CVE-2026-8646?

It affects 1 product.


Products: Ibm Websphere Application Server.

## How do I fix CVE-2026-8646?

No fix has been published for CVE-2026-8646 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-8646 being exploited?

There is no known exploitation of CVE-2026-8646 in the wild and no public exploit code.

## Other vulnerabilities in Ibm Websphere Application Server

- [CVE-2015-1920](https://insights.sbomify.com/CVE-2015-1920/): Code injection in n/a (critical 10.0)
- [CVE-2013-0462](https://insights.sbomify.com/CVE-2013-0462/): Other in n/a (critical 10.0)
- [CVE-2011-1377](https://insights.sbomify.com/CVE-2011-1377/): Security feature bypass in n/a (critical 10.0)
- [CVE-2010-3186](https://insights.sbomify.com/CVE-2010-3186/): Other in n/a (critical 10.0)
- [CVE-2009-1899](https://insights.sbomify.com/CVE-2009-1899/): Information disclosure in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-8646 and fix it if it is affected.

What it is: CVE-2026-8646 is a high-severity vulnerability in Ibm Websphere Application Server, published on 22 Jun 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-2026-8646 in the wild and no public exploit code.

Affected product: Ibm Websphere Application Server. 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-2026-8646/ (Markdown: https://insights.sbomify.com/CVE-2026-8646/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-8646
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-8646
- OSV: https://osv.dev/vulnerability/CVE-2026-8646

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-8646/
Summaries are generated and may contain mistakes; the official description above is the record.