CVE-2026-56968
GNU SASL NTLM Client Memory Disclosure
Description
GNU SASL before 2.2.4 lacks sanitization of a short challenge in _gsasl_ntlm_client_step in the NTLM client, which could result in memory disclosure via a crafted server.
INFO
Published Date :
June 23, 2026, 5:17 p.m.
Last Modified :
June 29, 2026, 11 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-56968
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | LOW | 8254265b-2729-46b6-b9e3-3dfca2d5bfca | ||||
| CVSS 3.1 | LOW | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update GNU SASL to version 2.2.4 or later.
- Apply vendor-supplied security patches.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-56968.
| URL | Resource |
|---|---|
| https://ftp.gnu.org/gnu/gsasl/ | Product |
| https://lists.debian.org/debian-security-announce/2026/msg00259.html | Mailing List |
| https://lists.gnu.org/archive/html/help-gsasl/2026-06/msg00000.html | Exploit Mailing List Vendor Advisory |
| https://www.gnu.org/software/gsasl/ | Product |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-56968 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-56968
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-56968 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-56968 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jun. 29, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Added CWE CWE-908 Added CPE Configuration OR *cpe:2.3:a:gnu:sasl:*:*:*:*:*:*:*:* versions up to (excluding) 2.2.4 Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:13.0:*:*:*:*:*:*:* Added Reference Type MITRE: https://ftp.gnu.org/gnu/gsasl/ Types: Product Added Reference Type MITRE: https://lists.debian.org/debian-security-announce/2026/msg00259.html Types: Mailing List Added Reference Type MITRE: https://lists.gnu.org/archive/html/help-gsasl/2026-06/msg00000.html Types: Exploit, Mailing List, Vendor Advisory Added Reference Type MITRE: https://www.gnu.org/software/gsasl/ Types: Product -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 23, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-56968', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-23T17:31:41.785915Z'} -
New CVE Received by [email protected]
Jun. 23, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'GNU', 'product': 'GNU SASL', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '2.2.4', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added Description GNU SASL before 2.2.4 lacks sanitization of a short challenge in _gsasl_ntlm_client_step in the NTLM client, which could result in memory disclosure via a crafted server. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N Added CWE CWE-839 Added Reference https://ftp.gnu.org/gnu/gsasl/ Added Reference https://lists.debian.org/debian-security-announce/2026/msg00259.html Added Reference https://lists.gnu.org/archive/html/help-gsasl/2026-06/msg00000.html Added Reference https://www.gnu.org/software/gsasl/