How severe is CVE-2025-10858?

CVE-2025-10858 has a CVSS 3.x base score of 7.5, rated high 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 high.

Is CVE-2025-10858 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-10858?

CVE-2025-10858 primarily affects Gitlab. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-10858?

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

Does CVE-2025-10858 have an EU (EUVD) identifier?

Yes. CVE-2025-10858 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31327.

When was CVE-2025-10858 published?

CVE-2025-10858 was published on 2025-09-26 and last updated on 2026-06-17.

CVE-2025-10858

CVE-2025-10858 is a high-severity vulnerability in Gitlab with a CVSS 3.x base score of 7.5. 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-770.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-31327
Weakness: CWE-770
Affected product: Gitlab
Published: 2025-09-26
Last modified: 2026-06-17

Description

An issue was discovered in GitLab CE/EE affecting all versions before 18.2.7, 18.3 before 18.3.3, and 18.4 before 18.4.1 that allows unauthenticated users to cause a Denial of Service (DoS) condition while uploading specifically crafted large JSON files.

Frequently asked questions

What is CVE-2025-10858?: An issue was discovered in GitLab CE/EE affecting all versions before 18.2.7, 18.3 before 18.3.3, and 18.4 before 18.4.1 that allows unauthenticated users to cause a Denial of Service (DoS) condition while uploading specifically crafted large JSON files.
How severe is CVE-2025-10858?: CVE-2025-10858 has a CVSS 3.x base score of 7.5, rated high 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 high.
Is CVE-2025-10858 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-10858?: CVE-2025-10858 primarily affects Gitlab. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-10858?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-10858 have an EU (EUVD) identifier?: Yes. CVE-2025-10858 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31327.
When was CVE-2025-10858 published?: CVE-2025-10858 was published on 2025-09-26 and last updated on 2026-06-17.

References

https://gitlab.com/gitlab-org/gitlab/-/issues/570034

Affected products (4)

cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:gitlab:gitlab:18.4.0:*:*:*:community:*:*:*
cpe:2.3:a:gitlab:gitlab:18.4.0:*:*:*:enterprise:*:*:*

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