NVD / CVE Program· CNA GitHub_M

CVE-2026-33623: PinchTab: OS Command Injection via Profile Name in Windows Cleanup Routine Enables Arbitrary Command Execution

Noroxi assessment

Priority: Monitor (action score 29/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 3% (FIRST EPSS); higher than 87.5% of all records.
Anyone who can reach it over the internet can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
Fixed version: github.com/pinchtab/pinchtab (Go) 0.8.5; github.com/pinchtab/pinchtab/cmd/pinchtab (Go) 0.8.5.

Low priority for now. Upgrade to github.com/pinchtab/pinchtab (Go) 0.8.5; github.com/pinchtab/pinchtab/cmd/pinchtab (Go) 0.8.5 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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 metacharacters. If an attacker can launch an instance using a crafted profile name and then trigger the cleanup path, they may be able to execute arbitrary PowerShell commands on the Windows host in the security context of the PinchTab process user. This is not an unauthenticated internet RCE. It requires authenticated, administrative-equivalent API access to instance lifecycle endpoints, and the resulting command execution inherits the permissions of the PinchTab OS user rather than bypassing host privilege boundaries. Version 0.8.5 contains a patch for the issue.

HighCVSS 7.2 · v3.1—No exploit Fix available

Published: Mar 26, 2026
Updated: Jun 17, 2026
EPSS: 3.0% · 87th percentile
CWE: CWE-78

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 28 / 40 · 7.2 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 3.0%

CISA SSVC decision

Exploitation: proof of concept
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 7.2
CNA · GitHub_M: 6.7; 0.5 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
pinchtab	pinchtab	cpe:2.3:a:pinchtab:pinchtab

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

pinchtab pinchtabbefore 0.8.5

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

pinchtab pinchtab
- < 0.8.5affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Go	github.com/pinchtab/pinchtab	before 0.8.5	0.8.5
Go	github.com/pinchtab/pinchtab/cmd/pinchtab	before 0.8.5	0.8.5

Same product

pinchtab: all records

Other highest-scoring records for the same primary product.

CVE-2026-30834PinchTab: SSRF with Full Response Exfiltration via Download Handler
30Monitor
CVE-2026-33621PinchTab: Unapplied Rate Limiting Middleware Allows Unbounded Brute-Force of API Token
26Monitor
CVE-2026-33622A PinchTab Security Policy Bypass in /wait Allows Arbitrary JavaScript Execution
24Monitor

Published before and after this one in the same product

← EarlierCVE-2026-33081Mar 20, 2026 · PinchTab has Blind SSRF via browser-side redirect bypass in /download URL validation
14Monitor
← EarlierCVE-2026-33619Mar 26, 2026 · PinchTab has Unauthenticated Blind SSRF in Task Scheduler via Unvalidated callbackUrl
22Monitor
← EarlierCVE-2026-33620Mar 26, 2026 · PinchTab: API Bearer Token Exposed in URL Query Parameter via Server Logs and Intermediary Systems
17Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Go:github.com/pinchtab/pinchtab	0.8.5	Package registry (OSV)
Go:github.com/pinchtab/pinchtab/cmd/pinchtab	0.8.5	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

pinchtab/pinchtabcommit 25b3374

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

—

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

CVE-2026-336210 days apartPinchTab: Unapplied Rate Limiting Middleware Allows Unbounded Brute-Force of API Token
26Monitor
CVE-2026-336220 days apartA PinchTab Security Policy Bypass in /wait Allows Arbitrary JavaScript Execution
24Monitor
CVE-2026-336200 days apartPinchTab: API Bearer Token Exposed in URL Query Parameter via Server Logs and Intermediary Systems
17Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
Administrator privileges are required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: High
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSS vector

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

nvd-primary

Root cause

User input is inserted as text into a shell command. The shell may interpret special characters in the input as part of the command.

The bug in code

The whole CWE-78 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1const host = req.body.host;
2exec("ping -c 1 " + host, onResult);

Fixed

1const host = req.body.host;
2if (!/^[a-z0-9.-]{1,253}$/i.test(host)) return res.sendStatus(400);
3execFile("ping", ["-c", "1", host], onResult);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log

Fix✗ → ✓Sep 28, 2026, 10:48 PM UTC

For records you follow, these changes also arrive as notifications. →

References

github.com/pinchtab/pinchtab/commit/25b3374bdcdf0dad32c44d5d726bf953238cd8bd

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records