5.8

CVE-2026-33081: PinchTab has Blind SSRF via browser-side redirect bypass in /download URL validation

Analyzed
AliasesGHSA-qwxp-6qf9-wr4mGO-2026-4748
Published 20-03-2026Last modified 20-03-2026

Vulnerability summary

CVE-2026-33081 is a medium (CVSS 5.8) Server-Side Request Forgery vulnerability in pinchtab. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 22% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Routine

Not severe (CVSS 5.8, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.8/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.29%
0%100%
Low · -0.03 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2026:21483-1SUSE-SU-2026:1135-1

Timeline

  1. 20-03-2026
    PublishedVulnerability first disclosed.
  2. 20-03-2026
    Last modifiedVulnerability information updated.

Description

PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. Versions 0.8.2 and below have a Blind SSRF vulnerability in the /download endpoint. The validateDownloadURL() function only checks the initial user-supplied URL, but the embedded Chromium browser can follow attacker-controlled redirects/navigations to internal network addresses after validation. Exploitation requires security.allowDownload=true (disabled by default), limiting real-world impact. An attacker-controlled page can use JavaScript redirects or resource requests to make the browser reach internal services from the PinchTab host, resulting in a blind Server-Side Request Forgery (SSRF) condition against internal-only services. The issue has been patched in version 0.8.3.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

22%

Versus all other CVEs

30-day change

Decrease -0.03 pp

From 0.32% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • githubUnverified

    Pinchtab

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Github.com/pinchtab1 product
  • pinchtab< 0.8.3
Pinchtab1 product

2 vendors · 2 products

References

4 links