CVE-2025-46784Network attack vector

Memory exhaustion via unreleased Base64 buffer

Published Nov 5, 2025 · Updated Nov 5, 2025

Memory leak in Lasso 2.5.1 allows remote attackers to exhaust memory by sending a malformed SAML response to its message parser. lasso_node_init_from_message_with_format allocates a Base64-decoding buffer with g_malloc and leaves it unreleased on successful decoding paths. Repeated unauthenticated network requests can deplete the hosting process's memory and interrupt the SAML-dependent service, without reported data disclosure or modification.

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

Memory leak in Lasso 2.5.1 allows remote attackers to exhaust memory by sending a malformed SAML response to its message parser. lasso_node_init_from_message_with_format allocates a Base64-decoding buffer with g_malloc and leaves it unreleased on successful decoding paths. Repeated unauthenticated network requests can deplete the hosting process's memory and interrupt the SAML-dependent service, without reported data disclosure or modification.

The record

CVE
CVE-2025-46784
Published
Nov 5, 2025
Updated
Nov 5, 2025
Vendor
Entr'ouvert
Product
Lasso
Classifications
CWE-401, T1499.004
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

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499.004Application or System Exploitation

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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