CVE-2026-56968

LOW

3.7

CVSS v3

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.

CWE-839 CWE-908

How to fix

Remediation Available

gsaslDebian

Fixed in:1.10.0-4+deb11u3CVE-2026-56968

Fixed in:2.2.0-1+deb12u2CVE-2026-56968

Fixed in:2.2.2-1.1+deb13u2CVE-2026-56968

Fixed in:2.2.4-1CVE-2026-56968

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploit Intelligence

0.29%probability of exploitation in 30 days

21stpercentile

Low risk: more likely to be exploited than 21% of all known CVEs.

References

Exploit1

lists.gnu.org

Mailing List1

lists.debian.org

Product2

Other references1

lists.debian.org

Related Vulnerabilities

Other CWE-839 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-20925	High	7.5	1.7%	-	Fix
CVE-2026-53176	High	9.1	0.7%	-	Fix
CVE-2023-22854	High	7.5	0.6%	-	Fix
CVE-2023-0425	High	8.6	0.5%	-	Fix
CVE-2026-48840	Medium	5.3	0.3%	-	Fix

Common questions

How do I fix CVE-2026-56968?

Upgrade gsasl on debian 11 to 1.10.0-4+deb11u3 or later.

Is CVE-2026-56968 being actively exploited?

Not that we know of. CVE-2026-56968 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.29% is the estimated probability that it will be exploited in the next 30 days. That is higher than 21% of all scored CVEs.

How severe is CVE-2026-56968?

CVE-2026-56968 has a CVSS v3 base score of 3.7, rated low. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-56968 affect?

Published advisories record a fix for gsasl (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-31.