CVE-2021-28789: The unofficial apple/swift-format extension before 1.1.2 for Visual Studio Code allows remote attackers to exe

Q: How do I fix CVE-2021-28789?

apple-swift-format: upgrade to 1.1.2. Exact commands for each OS are on this page.

Q: Is CVE-2021-28789 being exploited?

CVE-2021-28789 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-28789 affect?

CVE-2021-28789 affects apple-swift-format. Severity is high (CVSS 7.8). The unofficial apple/swift-format extension before 1.1.2 for Visual Studio Code allows remote attackers to execute arbitrary code by constructing a malicious workspace with a crafted apple-swift-format.path configuration value that triggers

This month

HIGH 7.8UPGRADE

CVE-2021-28789 is a high-severity flaw (CVSS 7.8) affecting apple-swift-format. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The unofficial apple/swift-format extension before 1.1.2 for Visual Studio Code allows remote attackers to execute arbitrary code by constructing a malicious workspace with a crafted apple-swift-format.path configuration value that triggers execution upon opening the workspace.

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	1.7% (top 23%)
CISA exploited list	No
Published	2021-03-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: apple-swift-format project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-03-18 16:15 UTCPublished CVE record published
2026-06-17 03:46 UTCUpdated Record last modified

apple-swift-format project apple-swift-format UPGRADE

Affected: < 1.1.2

Fixed in: 1.1.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy apple-swift-format || rpm -q apple-swift-format || apple-swift-format --version

2. UPGRADE to 1.1.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade apple-swift-format

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade apple-swift-format

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
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-2021-28789?

apple-swift-format: upgrade to 1.1.2. Exact commands for each OS are on this page.

Is CVE-2021-28789 being exploited?

CVE-2021-28789 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-2021-28789 affect?

CVE-2021-28789 affects apple-swift-format. Severity is high (CVSS 7.8). The unofficial apple/swift-format extension before 1.1.2 for Visual Studio Code allows remote attackers to execute arbitrary code by constructing a malicious workspace with a crafted apple-swift-format.path configuration value that triggers

How urgent is CVE-2021-28789?

Priority 47/100. High severity

Software pages

Visual Studio vulnerabilities · Swift vulnerabilities

References

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