PatchTheCVECVE-2021-23422: This affects the package bikeshed before 3.0.0
CVE-2021-23422 is a high-severity flaw (CVSS 7.8) affecting bikeshed. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
This affects the package bikeshed before 3.0.0. This can occur when an untrusted source file containing Inline Tag Command metadata is processed. When an arbitrary OS command is executed, the command output would be included in the HTML output.
Why this priority
- High severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.8 (High) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.8% (top 44%) |
| CISA exploited list | No |
| Weakness | CWE-78 |
| Published | 2021-08-16 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-23422?
bikeshed: upgrade to 3.0.0. Exact commands for each OS are on this page.
Is CVE-2021-23422 being exploited?
CVE-2021-23422 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-23422 affect?
CVE-2021-23422 affects bikeshed. Severity is high (CVSS 7.8). This affects the package bikeshed before 3.0.0. This can occur when an untrusted source file containing Inline Tag Command metadata is processed. When an arbitrary OS command is executed, the command output would be included in the HTML out
How urgent is CVE-2021-23422?
Priority 41/100. High severity
Related CVEs
- CVE-2021-23423 MEDIUM 5.5 UPGRADE This affects the package bikeshed before 3.0.0