What is CVE-2020-13306?

CVE-2020-13306 is a low-severity vulnerability in GitLab, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 3.7/10. Published 2020-09-14.

How severe is CVE-2020-13306?

Low severity. CVSS v3 base score is 3.7 out of 10.

Resource exhaustion in GitLab

CVE-2020-13306

A vulnerability was discovered in GitLab versions before 13.1.10, 13.2.8 and 13.3.4. GitLab Webhook feature could be abused to perform denial of service attacks due to the lack of rate limitation.

Published 2020-09-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.018 (78.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 78.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

GitLab — versions >=1.0, <13.1.10, >=13.2, <13.2.8, >=13.3, <13.3.4

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

gitlab.com/gitlab-org/gitlab/-/issues/223681 (Broken Link)
hackerone.com/reports/904134 (Permissions Required)
gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13306.json (Third Party Advisory)

Frequently asked questions

What is CVE-2020-13306?: CVE-2020-13306 is a low-severity vulnerability in GitLab, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 3.7/10. Published 2020-09-14.
How severe is CVE-2020-13306?: Low severity. CVSS v3 base score is 3.7 out of 10.