CVE-2025-46404Network attack vector

Service crash via unchecked namespace pointer

Published Nov 5, 2025 · Updated Nov 5, 2025

NULL pointer dereference in Entr'ouvert Lasso 2.5.1 allows remote attackers to crash SAML-processing applications with a malformed response. lasso_provider_verify_saml_signature passes the unchecked NULL result of xmlSecGetNodeNsHref to strcmp while determining the signed node's namespace. No authentication or user interaction is required, but the consequence is limited to crashing the application process that invokes the vulnerable library routine.

CVSS severity7.5
High
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Entr'ouvert Lasso 2.5.1 allows remote attackers to crash SAML-processing applications with a malformed response. lasso_provider_verify_saml_signature passes the unchecked NULL result of xmlSecGetNodeNsHref to strcmp while determining the signed node's namespace. No authentication or user interaction is required, but the consequence is limited to crashing the application process that invokes the vulnerable library routine.

The record

CVE
CVE-2025-46404
Published
Nov 5, 2025
Updated
Nov 5, 2025
Vendor
Entr'ouvert
Product
Lasso
Classifications
CWE-476, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Entr'ouvert · Lassoversion=2.5.1

Published CVSS scores

7.5Cisco TalosCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7SUSECVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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