CVE-2021-39940

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

1.46% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 71.7% of scored records. A rank, not a probability.

NVD base score

6.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-12-13 15:47Z4 YR AGO

Last updated

2024-08-04 02:20Z2 YR AGO

Reserved

2021-08-23

Assigning CNA

GitLab

Record state

PUBLISHED

Severity

Medium (CVSS 4.3)

CNA CVSS vector

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

Weaknesses

• CWE-1333Inefficient Regular Expression ComplexityBase

Data version

5.1

Document digest

bbea804979e573d3f91a2fbd950692981b3dd9d1b246e6d24e9389538d141da5

• gitlab.comhttps://gitlab.com/gitlab-org/gitlab/-/issues/263116x_refsource_MISC
• hackerone.comhttps://hackerone.com/reports/997961x_refsource_MISC
• gitlab.comhttps://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39940.jsonx_refsource_CONFIRM