# CVE-2026-11477: hs-web hsweb-framework OAuth2 Client OAuth2Client.java OAuth2Client redirect

> Attackers can exploit an open redirect in the OAuth2 client to bypass security controls, requiring a patch for the hsweb-framework library.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 8 Jun 2026
- **Updated:** 8 Jun 2026
- **Also known as:** GHSA-fxr3-gvm4-m8vc

## What is CVE-2026-11477?

CVE-2026-11477 is a medium-severity vulnerability in hs-web hsweb-framework, published on 8 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A vulnerability was detected in hs-web hsweb-framework up to 5.0.1. This affects the function OAuth2Client of the file hsweb-authorization/hsweb-authorization-oauth2/src/main/java/org/hswebframework/web/oauth2/server/OAuth2Client.java of the component OAuth2 Client. The manipulation results in open redirect. The attack can be executed remotely. The exploit is now public and may be used. The patch is identified as c2882679a9125cea52678151af5ae213cbd52579. Applying a patch is advised to resolve this issue.

Weakness: CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2026-11477?

2 open source packages ship an affected version, including org.hswebframework.web:hsweb-authorization-oauth2.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.hswebframework.web:hsweb-authorization-oauth2` | Maven | All versions to 5.0.1 | None |
| `org.hswebframework.web:hsweb-authorization-oauth2` | Maven | All versions to 5.0.1 | None |

## How do I fix CVE-2026-11477?

No fix has been published for CVE-2026-11477 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-11477 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11477 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-11477 and fix it if it is affected.

What it is: CVE-2026-11477 is a medium-severity vulnerability in hs-web hsweb-framework, published on 8 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11477 exists.

Affected packages and fixed versions:
- org.hswebframework.web:hsweb-authorization-oauth2 (Maven): affected all versions up to 5.0.1; no fix listed
- org.hswebframework.web:hsweb-authorization-oauth2 (Maven): affected all versions up to 5.0.1; no fix listed

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-2026-11477/ (Markdown: https://insights.sbomify.com/CVE-2026-11477/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-11477
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-11477
- OSV: https://osv.dev/vulnerability/CVE-2026-11477

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-11477/
Summaries are generated and may contain mistakes; the official description above is the record.