# CVE-2026-47234: Admidio writes session IDs and auto-login cookie values to application logs

> Attackers with log access can steal session and auto-login cookies to hijack user accounts in Admidio when debug logging is enabled.

- **Severity:** Medium 4.4 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 12 Aug 2026
- **Updated:** 12 Aug 2026
- **Also known as:** GHSA-mch8-wf3h-6x88

## What is CVE-2026-47234?

CVE-2026-47234 is a medium-severity vulnerability in admidio, published on 12 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Admidio is an open-source user management solution. Prior to version 5.0.10, when debug logging is enabled, `Session::setCookie()` logs full cookie values and `Session::start()` logs the current session ID. In a real Admidio deployment this includes both the active session cookie and the persistent auto-login cookie. Anyone with access to the log sink can recover live bearer-style credentials from the logs. Version 5.0.10 contains a fix.

Weakness: CWE-532 (Insertion of Sensitive Information into Log File), CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2026-47234?

2 open source packages ship an affected version, including admidio/admidio.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `admidio/admidio` | Packagist | All versions | 5.0.10 |
| `admidio/admidio` | Packagist | All versions | 5.0.10 |

## How do I fix CVE-2026-47234?

Upgrade admidio/admidio to 5.0.10 or later.

## Is CVE-2026-47234 being exploited?

There is no known exploitation of CVE-2026-47234 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-47234 and fix it if it is affected.

What it is: CVE-2026-47234 is a medium-severity vulnerability in admidio, published on 12 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-47234 in the wild and no public exploit code.

Affected packages and fixed versions:
- admidio/admidio (Packagist): affected all versions; fixed in 5.0.10
- admidio/admidio (Packagist): affected all versions; fixed in 5.0.10

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-2026-47234/ (Markdown: https://insights.sbomify.com/CVE-2026-47234/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-47234
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-47234
- OSV: https://osv.dev/vulnerability/CVE-2026-47234

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-47234/
Summaries are generated and may contain mistakes; the official description above is the record.