CVE-2021-43809

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

2.80% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 85.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

2021-12-08 18:50Z4 YR AGO

Last updated

2025-11-03 19:26Z10 MO AGO

Reserved

2021-11-16

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 6.7)

CNA CVSS vector

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

Weaknesses

• CWE-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')Base

Data version

5.2

Document digest

0483b30084ef74150efdaabc71415d9d39ed89d994be7ffc2542eda36e28e452

• github.comhttps://github.com/rubygems/rubygems/security/advisories/GHSA-fj7f-vq84-fh43x_refsource_CONFIRM
• github.comhttps://github.com/rubygems/rubygems/pull/5142x_refsource_MISC
• github.comhttps://github.com/rubygems/rubygems/commit/0fad1ccfe9dd7a3c5b82c1496df3c2b4842870d3x_refsource_MISC
• github.comhttps://github.com/rubygems/rubygems/commit/a4f2f8ac17e6ce81c689527a8b6f14381060d95fx_refsource_MISC
• www.sonarsource.comhttps://www.sonarsource.com/blog/securing-developer-tools-package-managers/x_refsource_MISC
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00015.html