CVE-2025-10858

HIGH 7.5 ALL-YEARS

Published 2025-09-26 · Last modified 2025-09-26 · GitLab · NVD: Analyzed

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.

ELEVATED IMPACT

Severe if exploited (CVSS 7.5), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

0.6%chance of exploitation in 30 days · 47th percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation none, automatable yes

Impact if exploited

7.5CVSS 3.1 · HIGH · CNA

ConfidentialityNone
IntegrityNone
AvailabilityHigh

What an attacker needs

✓Access: Reachable over the network — no local access needed
✓Privileges: No account or privileges required
✓User interaction: No user interaction needed
✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Affected

Vendors Gitlab

Products Gitlab

Weakness (CWE)

CWE-770: : Allocation of Resources Without Limits or Throttling

CVSS vector

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

References and research data (JSON)

Known Affected Software Configurations

Vendor	Product	Version range
Gitlab	Gitlab	< 18.2.7
Gitlab	Gitlab	< 18.2.7
Gitlab	Gitlab	≥ 18.3.0 and < 18.3.3
Gitlab	Gitlab	≥ 18.3.0 and < 18.3.3
Gitlab	Gitlab	18.4.0
Gitlab	Gitlab	18.4.0

All CVSS metrics

HIGH 7.5 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
HIGH 7.5 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Advisories

https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-31327 ADVISORYEUVD · EUVD-2025-31327

Technical & other

https://gitlab.com/gitlab-org/gitlab/-/issues/570034 issue-trackingpermissions-requiredBroken LinkCVE record · GitLab · Updated 2025-09-26T09:04:31.555Z
NVD · CVE-2025-10858 · Updated 2026-10-19T16:10:00.260

Sources: NVD · CVE.org · All sources and attribution · EPSS