# CVE-2026-56706: Adminer before 5.4.3 CSRF Token Secret Recovery via XOR Masking

> Attackers can recover CSRF secrets from tokens to forge requests, enabling arbitrary SQL execution against authenticated Adminer sessions.

- **Severity:** Medium 6.1 (`CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA: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:** 25 Aug 2026
- **Updated:** 25 Aug 2026
- **Also known as:** DEBIAN-CVE-2026-56706, GHSA-33j4-hc95-pggg, GHSA-wjcm-7h7g-36vh, UBUNTU-CVE-2026-56706

## What is CVE-2026-56706?

CVE-2026-56706 is a medium-severity vulnerability in vrana adminer, published on 25 Aug 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

Adminer before 5.4.3 uses a CSRF token scheme that transmits both the XOR mask and the masked value in every token (format (rand XOR secret):rand), allowing anyone who observes a single CSRF token (e.g., via network sniffing, log files, Referrer header, or XSS) to recover the session secret with a single XOR operation and forge unlimited valid tokens. The implementation is further weakened by a low-entropy session token (rand(1,1e6), ~20 bits) that permits blind brute-force, and by use of loose comparison (==) in token verification, enabling PHP type juggling. Exploitation enables cross-site request forgery against authenticated sessions, including execution of arbitrary SQL queries.

Weakness: CWE-330 (Use of Insufficiently Random Values)

## Which versions are affected by CVE-2026-56706?


## How do I fix CVE-2026-56706?

Upgrade to a fixed version.

## Is CVE-2026-56706 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56706 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-56706 and fix it if it is affected.

What it is: CVE-2026-56706 is a medium-severity vulnerability in vrana adminer, published on 25 Aug 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-2026-56706 exists.

Affected product: vrana adminer. 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-2026-56706/ (Markdown: https://insights.sbomify.com/CVE-2026-56706/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-56706
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-56706
- OSV: https://osv.dev/vulnerability/CVE-2026-56706

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-56706/
Summaries are generated and may contain mistakes; the official description above is the record.