# CVE-2026-48924: Jenkins Bitbucket OAuth Plugin does not restrict the redirect URL after login

> Attackers can exploit unrestricted redirect URLs in the Jenkins Bitbucket OAuth Plugin to conduct phishing attacks against users.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N`)
- **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:** Yes
- **Published:** 27 May 2026
- **Updated:** 27 May 2026
- **Also known as:** GHSA-r8fj-rff6-f7h5

## What is CVE-2026-48924?

CVE-2026-48924 is a medium-severity vulnerability in Jenkins Bitbucket OAuth Plugin, published on 27 May 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

Jenkins Bitbucket OAuth Plugin 0.17 and earlier does not restrict the redirect URL after login, allowing attackers to perform phishing attacks.

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

## Which versions are affected by CVE-2026-48924?

2 open source packages ship an affected version, including org.jenkins-ci.plugins:bitbucket-oauth. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.jenkins-ci.plugins:bitbucket-oauth` | Maven | All versions | 0.18 |
| `org.jenkins-ci.plugins:bitbucket-oauth` | Maven | All versions | 0.18 |

Products: Jenkins Bitbucket Oauth.

## How do I fix CVE-2026-48924?

Upgrade org.jenkins-ci.plugins:bitbucket-oauth to 0.18 or later.

## Is CVE-2026-48924 being exploited?

There is no known exploitation of CVE-2026-48924 in the wild and no public exploit code.

## Other vulnerabilities in Jenkins Bitbucket OAuth Plugin

- [CVE-2023-24427](https://insights.sbomify.com/CVE-2023-24427/): Session fixation vulnerability in Jenkins Bitbucket OAuth Plugin (critical 9.8)
- [CVE-2019-10460](https://insights.sbomify.com/CVE-2019-10460/): Jenkins Bitbucket OAuth Plugin contains Insufficiently Protected Credentials (high 7.8)
- [CVE-2023-24428](https://insights.sbomify.com/CVE-2023-24428/): Cross-site request forgery vulnerability in Jenkins Bitbucket OAuth Plugin (medium 5.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-48924 and fix it if it is affected.

What it is: CVE-2026-48924 is a medium-severity vulnerability in Jenkins Bitbucket OAuth Plugin, published on 27 May 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: There is no known exploitation of CVE-2026-48924 in the wild and no public exploit code.

Affected packages and fixed versions:
- org.jenkins-ci.plugins:bitbucket-oauth (Maven): affected all versions; fixed in 0.18
- org.jenkins-ci.plugins:bitbucket-oauth (Maven): affected all versions; fixed in 0.18

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-2026-48924/ (Markdown: https://insights.sbomify.com/CVE-2026-48924/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-48924
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-48924
- OSV: https://osv.dev/vulnerability/CVE-2026-48924

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-48924/
Summaries are generated and may contain mistakes; the official description above is the record.