How severe is CVE-2026-32952?

CVE-2026-32952 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-32952 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-32952?

CVE-2026-32952 affects Microsoft Go-ntlmssp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-32952?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-32952 have an EU (EUVD) identifier?

Yes. CVE-2026-32952 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25374.

When was CVE-2026-32952 published?

CVE-2026-32952 was published on 2026-04-24 and last updated on 2026-06-17.

CVE-2026-32952

CVE-2026-32952 is a medium-severity vulnerability in Microsoft Go-ntlmssp with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-190.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-25374
Weakness: CWE-190
Affected product: Microsoft Go-ntlmssp
Published: 2026-04-24
Last modified: 2026-06-17

Description

go-ntlmssp is a Go package that provides NTLM/Negotiate authentication over HTTP. Prior to version 0.1.1, a malicious NTLM challenge message can causes an slice out of bounds panic, which can crash any Go process using `ntlmssp.Negotiator` as an HTTP transport. Version 0.1.1 patches the issue.

Frequently asked questions

What is CVE-2026-32952?: go-ntlmssp is a Go package that provides NTLM/Negotiate authentication over HTTP. Prior to version 0.1.1, a malicious NTLM challenge message can causes an slice out of bounds panic, which can crash any Go process using `ntlmssp.Negotiator` as an HTTP transport. Version 0.1.1 patches the issue.
How severe is CVE-2026-32952?: CVE-2026-32952 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-32952 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-32952?: CVE-2026-32952 affects Microsoft Go-ntlmssp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-32952?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-32952 have an EU (EUVD) identifier?: Yes. CVE-2026-32952 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25374.
When was CVE-2026-32952 published?: CVE-2026-32952 was published on 2026-04-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:microsoft:go-ntlmssp:*:*:*:*:*:go:*:*

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