Medium severity · published Jun 23, 2026
CVE-2026-56968
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
5.3
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GS
GNU SASL · GNU
before 2.2.4 · source: vendor
DL
Debian Linux · Debian
13.0 · source: NVD
SA
Sasl · Gnu
before 2.2.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-56968
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-56968
Product
https://ftp.gnu.org/gnu/gsasl/
Mailing List
https://lists.debian.org/debian-security-announce/2026/msg00259.html
Exploit
https://lists.gnu.org/archive/html/help-gsasl/2026-06/msg00000.html
Product
https://www.gnu.org/software/gsasl/
lists.debian.org
https://lists.debian.org/debian-lts-announce/2026/07/msg00049.html
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