CVE-2026-33623: PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser

Q: How do I fix CVE-2026-33623?

pinchtab: upgrade to 0.8.5. Exact commands for each OS are on this page.

Q: Is CVE-2026-33623 being exploited?

CVE-2026-33623 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-2026-33623 affect?

CVE-2026-33623 affects pinchtab. Severity is medium (CVSS 6.7). PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. PinchTab `v0.8.4` contains a Windows-only command injection issue in the orphaned Chrome cleanup path. When an instance is stopped, the Windows

Q: How urgent is CVE-2026-33623?

Priority 50/100. Public exploit reference

This month

MEDIUM 6.7UPGRADE

CVE-2026-33623 is a medium-severity flaw (CVSS 6.7) affecting pinchtab. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. PinchTab `v0.8.4` contains a Windows-only command injection issue in the orphaned Chrome cleanup path. When an instance is stopped, the Windows cleanup routine builds a PowerShell `-Command` string using a `needle` derived from the profile path. In `v0.8.4`, that string interpolation escapes backslashes but does not safely neutralize other PowerShell m

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.7 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	3.0% (top 13%)
CISA exploited list	No
Weakness	CWE-78, CWE-400
Published	2026-03-26
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: pinchtab

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

Am I affected?

Timeline

2026-03-26 21:17 UTCPublished CVE record published
2026-06-17 10:37 UTCUpdated Record last modified

pinchtab pinchtab UPGRADE

Affected: < 0.8.5

Fixed in: 0.8.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pinchtab || rpm -q pinchtab || pinchtab --version

2. UPGRADE to 0.8.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pinchtab

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pinchtab

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-2026-33623?

pinchtab: upgrade to 0.8.5. Exact commands for each OS are on this page.

Is CVE-2026-33623 being exploited?

CVE-2026-33623 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-2026-33623 affect?

CVE-2026-33623 affects pinchtab. Severity is medium (CVSS 6.7). PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. PinchTab `v0.8.4` contains a Windows-only command injection issue in the orphaned Chrome cleanup path. When an instance is stopped, the Windows

How urgent is CVE-2026-33623?

Priority 50/100. Public exploit reference

Software pages

Windows vulnerabilities · Google Chrome vulnerabilities · PowerShell vulnerabilities

Related CVEs

CVE-2026-33622 HIGH 8.8 UPGRADE PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser
CVE-2026-33621 MEDIUM 4.8 UPGRADE PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser
CVE-2026-33620 MEDIUM 4.3 UPGRADE PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser
CVE-2026-33619 MEDIUM 4.1 UPGRADE PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser
CVE-2026-33081 MEDIUM 5.8 UPGRADE PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser

References

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