PatchTheCVECVE-2021-3726: # Vulnerability in `title` function **Description**: the `title` function defined in `lib/termsupport.zsh` use
CVE-2021-3726 is a high-severity flaw (CVSS 7.5) affecting oh my zsh. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
# Vulnerability in `title` function **Description**: the `title` function defined in `lib/termsupport.zsh` uses `print` to set the terminal title to a user-supplied string. In Oh My Zsh, this function is always used securely, but custom user code could use the `title` function in a way that is unsafe. **Fixed in**: [a263cdac](https://github.com/ohmyzsh/ohmyzsh/commit/a263cdac). **Impacted areas**: - `title` function in `lib/termsupport.zsh`. - Cu
Why this priority
- High severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.8% (top 43%) |
| CISA exploited list | No |
| Weakness | CWE-78 |
| Published | 2021-11-30 |
| 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-2021-3726?
oh my zsh: upgrade to 2021-11-11. Exact commands for each OS are on this page.
Is CVE-2021-3726 being exploited?
CVE-2021-3726 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-2021-3726 affect?
CVE-2021-3726 affects oh my zsh. Severity is high (CVSS 7.5). # Vulnerability in `title` function **Description**: the `title` function defined in `lib/termsupport.zsh` uses `print` to set the terminal title to a user-supplied string. In Oh My Zsh, this function is always used securely, but custom use
How urgent is CVE-2021-3726?
Priority 40/100. High severity
Software pages
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