# CVE-2025-46404: Null dereference in Lasso

> A null pointer dereference in the SAML signature verification allows attackers to cause a denial of service via crafted responses.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 5 Nov 2025
- **Updated:** 5 Nov 2025
- **Also known as:** AZL-69841, AZL-69854, DEBIAN-CVE-2025-46404, GHSA-2vvf-4m7q-pvpx, UBUNTU-CVE-2025-46404

## What is CVE-2025-46404?

CVE-2025-46404 is a high-severity vulnerability in Entr'ouvert Lasso, published on 5 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A denial of service vulnerability exists in the lasso_provider_verify_saml_signature functionality of Entr'ouvert Lasso 2.5.1. A specially crafted SAML response can lead to a denial of service. An attacker can send a malformed SAML response to trigger this vulnerability.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2025-46404?

It affects 1 product.


Products: Entrouvert Lasso.

## How do I fix CVE-2025-46404?

Upgrade to a fixed version.

## Is CVE-2025-46404 being exploited?

There is no known exploitation of CVE-2025-46404 in the wild and no public exploit code.

## Other vulnerabilities in Entr'ouvert Lasso

- [CVE-2025-47151](https://insights.sbomify.com/CVE-2025-47151/): Memory corruption in Lasso (critical 9.8)
- [CVE-2025-46705](https://insights.sbomify.com/CVE-2025-46705/): Denial of service in Lasso (high 7.5)
- [CVE-2025-46784](https://insights.sbomify.com/CVE-2025-46784/): Denial of service in Lasso (high 7.5)
- [CVE-2015-1783](https://insights.sbomify.com/CVE-2015-1783/): Denial of service in n/a (high 7.5)
- [CVE-2009-0050](https://insights.sbomify.com/CVE-2009-0050/): Security feature bypass in n/a (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-46404 and fix it if it is affected.

What it is: CVE-2025-46404 is a high-severity vulnerability in Entr'ouvert Lasso, published on 5 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-46404 in the wild and no public exploit code.

Affected product: Entr'ouvert Lasso. 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-2025-46404/ (Markdown: https://insights.sbomify.com/CVE-2025-46404/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-46404
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-46404
- OSV: https://osv.dev/vulnerability/CVE-2025-46404

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-46404/
Summaries are generated and may contain mistakes; the official description above is the record.