# CVE-2025-65104: Firebird: Information leak vulnerability in firebird3 client when used with newer server

> An information leak occurs in the Firebird 3 client library when communicating with newer servers due to incorrect data length values, allowing attackers to read sensitive memory.

- **Severity:** High 7.9 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 17 Apr 2026
- **Updated:** 17 Apr 2026
- **Also known as:** DEBIAN-CVE-2025-65104, GHSA-mfpr-9886-xjhg, UBUNTU-CVE-2025-65104

## What is CVE-2025-65104?

CVE-2025-65104 is a high-severity vulnerability in FirebirdSQL firebird, published on 17 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Firebird is an open-source relational database management system. In versions FB3 of the client library placed incorrect data length values into XSQLDA fields when communicating with FB4 or higher servers, resulting in an information leak. This issue is fixed by upgrading to the FB4 client or higher.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2025-65104?

It affects 1 product.


Products: Firebirdsql Firebird.

## How do I fix CVE-2025-65104?

Upgrade to a fixed version.

## Is CVE-2025-65104 being exploited?

There is no known exploitation of CVE-2025-65104 in the wild and no public exploit code.

## Other vulnerabilities in FirebirdSQL firebird

- [CVE-2026-40342](https://insights.sbomify.com/CVE-2026-40342/): Firebird: Path Traversal + Arbitrary File Write Leads to Remote Code Execution (critical 10.0)
- [CVE-2008-0467](https://insights.sbomify.com/CVE-2008-0467/): Memory corruption in n/a (critical 10.0)
- [CVE-2007-4992](https://insights.sbomify.com/CVE-2007-4992/): Memory corruption in n/a (critical 10.0)
- [CVE-2007-5245](https://insights.sbomify.com/CVE-2007-5245/): Memory corruption in n/a (critical 10.0)
- [CVE-2007-5246](https://insights.sbomify.com/CVE-2007-5246/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-65104 and fix it if it is affected.

What it is: CVE-2025-65104 is a high-severity vulnerability in FirebirdSQL firebird, published on 17 Apr 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-2025-65104 in the wild and no public exploit code.

Affected product: FirebirdSQL firebird. 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-2025-65104/ (Markdown: https://insights.sbomify.com/CVE-2025-65104/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-65104
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-65104
- OSV: https://osv.dev/vulnerability/CVE-2025-65104

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-65104/
Summaries are generated and may contain mistakes; the official description above is the record.