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Vulnerabilities

Vulnerability · CVE-2026-33620

PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser.

Published Mar 26, 2026 · catalog updated Jun 17, 2026 · PinchTab is a standalone

Check if you run it

No confirmed exploitation is on record for CVE-2026-33620. EPSS is 0.38%. Act only if a listed version of PinchTab is a standalone is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (PinchTab is a standalone).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium4.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.38%
Remediation
Advisory link
Affected products
cpe pinchtab/pinchtab

PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. PinchTab through accepted the API token from a URL query parameter in addition to the header. When a valid API credential is sent in the URL, it can be exposed through request URIs recorded by intermediaries or client-side tooling, such as reverse proxy access logs, browser history, shell history, clipboard history, and tracing systems that capture full URLs. This issue is an unsafe credential transport pattern rather than a direct authentication bypass. It only affects deployments where a token is configured and a client actually uses the query-parameter form. PinchTab's security guidance already recommended , but still accepted and included first-party flows that generated and consumed URLs containing the token. This was addressed in v0.8.4 by removing query-string token authentication and requiring safer header- or session-based authentication flows.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe pinchtab/pinchtabversion unspecified

How to fix CVE-2026-33620

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-33620. EPSS is 0.38%. Act only if a listed version of PinchTab is a standalone is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-598. EPSS 0.38%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 26, 2026 · NIST NVD

    Detected

    PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. PinchTab through accepted the API token from a URL query parameter in addition to the header. When a valid API credential is sent in the URL, it can be exposed through request URIs recorded by intermediaries or client-side tooling, such as reverse proxy access logs, browser history, shell history, clipb

  2. Jun 17, 2026 · NIST NVD

    Updated

    PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. PinchTab through accepted the API token from a URL query parameter in addition to the header. When a valid API credential is sent in the URL, it can be exposed through request URIs recorded by intermediaries or client-side tooling, such as reverse proxy access logs, browser history, shell history, clipb

Sources

  • CVE.orgVulnerability recordCVE-2026-33620

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-33620

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDVulnerability recordCVE-2026-33620

    PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. PinchTab through accepted the API token from a URL query parameter in addition to the header. When a valid API credential is sent in the URL,

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.