How severe is CVE-2025-58189?

CVE-2025-58189 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 low, integrity none, and availability none.

Is CVE-2025-58189 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-58189?

CVE-2025-58189 affects Golang Go. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-58189?

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

Does CVE-2025-58189 have an EU (EUVD) identifier?

Yes. CVE-2025-58189 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-36737.

When was CVE-2025-58189 published?

CVE-2025-58189 was published on 2025-10-29 and last updated on 2026-06-17.

CVE-2025-58189

CVE-2025-58189 is a medium-severity vulnerability in Golang Go 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-532.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-36737
Weakness: CWE-532
Affected product: Golang Go
Published: 2025-10-29
Last modified: 2026-06-17

Description

When Conn.Handshake fails during ALPN negotiation the error contains attacker controlled information (the ALPN protocols sent by the client) which is not escaped.

Frequently asked questions

What is CVE-2025-58189?: When Conn.Handshake fails during ALPN negotiation the error contains attacker controlled information (the ALPN protocols sent by the client) which is not escaped.
How severe is CVE-2025-58189?: CVE-2025-58189 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 low, integrity none, and availability none.
Is CVE-2025-58189 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-58189?: CVE-2025-58189 affects Golang Go. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-58189?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-58189 have an EU (EUVD) identifier?: Yes. CVE-2025-58189 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-36737.
When was CVE-2025-58189 published?: CVE-2025-58189 was published on 2025-10-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*

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