CVE-2021-29509

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

1.59% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 75.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/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

Moderate. Red Hat's rating for its own products, not a CVSS rating.

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

2021-05-11 16:50Z5 YR AGO

Last updated

2024-08-03 22:11Z2 YR AGO

Reserved

2021-03-30

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

• CWE-400Uncontrolled Resource ConsumptionClass
• CWE-667Improper LockingClass

Data version

5.1

Document digest

1e46c1747ac80ed1e4df9fc2aa773598390c217b0bf70a0e4750071cf0bf83c1

• github.comhttps://github.com/puma/puma/security/advisories/GHSA-q28m-8xjw-8vr5x_refsource_CONFIRM
• gist.github.comhttps://gist.github.com/nateberkopec/4b3ea5676c0d70cbb37c82d54be25837x_refsource_MISC
• github.comhttps://github.com/puma/puma/security/policyx_refsource_MISC
• rubygems.orghttps://rubygems.org/gems/pumax_refsource_MISC
• security.gentoo.orgGLSA-202208-28https://security.gentoo.org/glsa/202208-28vendor-advisoryx_refsource_GENTOO
• lists.debian.org[debian-lts-announce] 20220827 [SECURITY] [DLA 3083-1] puma security updatehttps://lists.debian.org/debian-lts-announce/2022/08/msg00015.htmlmailing-listx_refsource_MLIST