How severe is CVE-2025-63389?

CVE-2025-63389 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-63389 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-63389?

CVE-2025-63389 affects Ollama. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-63389?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-63389 have an EU (EUVD) identifier?

Yes. CVE-2025-63389 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204310.

When was CVE-2025-63389 published?

CVE-2025-63389 was published on 2025-12-18 and last updated on 2026-06-17.

CVE-2025-63389

CVE-2025-63389 is a critical-severity vulnerability in Ollama with a CVSS 3.x base score of 9.8. 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-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-204310
Weakness: CWE-306
Affected product: Ollama
Published: 2025-12-18
Last modified: 2026-06-17

Description

A critical authentication bypass vulnerability exists in Ollama platform's API endpoints in versions prior to and including v0.12.3. The platform exposes multiple API endpoints without requiring authentication, enabling remote attackers to perform unauthorized model management operations.

Frequently asked questions

What is CVE-2025-63389?: A critical authentication bypass vulnerability exists in Ollama platform's API endpoints in versions prior to and including v0.12.3. The platform exposes multiple API endpoints without requiring authentication, enabling remote attackers to perform unauthorized model management operations.
How severe is CVE-2025-63389?: CVE-2025-63389 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-63389 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-63389?: CVE-2025-63389 affects Ollama. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-63389?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-63389 have an EU (EUVD) identifier?: Yes. CVE-2025-63389 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204310.
When was CVE-2025-63389 published?: CVE-2025-63389 was published on 2025-12-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ollama:ollama:*:*:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

118.193.61.170 (ipv4-addr)
185.35.223.45 (ipv4-addr)