CVE-2025-32910Network attack vector

Client crash via missing Digest authentication realm

Published Apr 14, 2025 · Updated Jun 30, 2026

NULL pointer dereference in GNOME libsoup before 3.6.3 allows remote attackers to crash an HTTP client through a malicious server response. The Digest authentication path accepts a 401 challenge without a realm and later dereferences the absent value in soup_auth_digest_authenticate(). The client must connect to an attacker-controlled HTTP server and process its malformed Digest challenge; only the consuming application is interrupted.

CVSS severity6.5
Medium
EPSS probability0.45%
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 GNOME libsoup before 3.6.3 allows remote attackers to crash an HTTP client through a malicious server response. The Digest authentication path accepts a 401 challenge without a realm and later dereferences the absent value in soup_auth_digest_authenticate(). The client must connect to an attacker-controlled HTTP server and process its malformed Digest challenge; only the consuming application is interrupted.

The record

CVE
CVE-2025-32910
Published
Apr 14, 2025
Updated
Jun 30, 2026
Vendor
GNOME
Product
libsoup
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 30, 2026Record 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=0 <3.6.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GNOME · libsoupversion=0 <3.6.3
389 Directory Server · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.

Published CVSS scores

6.5Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
6.5CanonicalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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-476NULL Pointer Dereference
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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