CVE-2026-48829Network attack vectorHinoki check available

Unauthenticated service crash via missing DIGEST-MD5 value

Published May 24, 2026 · Updated May 24, 2026

NULL pointer dereference in GNU SASL before 2.2.3 allows remote attackers to crash clients and servers through DIGEST-MD5 input. digest_md5_getsubopt in lib/digest-md5/getsubopt.c accepts a known directive without an equals sign, returns it with a NULL value, and downstream parser code dereferences that pointer. The flaw is reachable before authentication when an application enables DIGEST-MD5, terminating its hosting process without affecting confidentiality or integrity.

CVSS severity7.5
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

NULL pointer dereference in GNU SASL before 2.2.3 allows remote attackers to crash clients and servers through DIGEST-MD5 input. digest_md5_getsubopt in lib/digest-md5/getsubopt.c accepts a known directive without an equals sign, returns it with a NULL value, and downstream parser code dereferences that pointer. The flaw is reachable before authentication when an application enables DIGEST-MD5, terminating its hosting process without affecting confidentiality or integrity.

The record

CVE
CVE-2026-48829
Published
May 24, 2026
Updated
May 24, 2026
Vendor
The GnuPG Project
Product
GNU SASL
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 24, 2026CVE publishedPublication date reported by the CVE source.
  2. May 24, 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 <2.2.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The GnuPG Project · GNU SASLversion=0 <2.2.3

Published CVSS scores

7.5MITRECVSS: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

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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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