CVE-2026-33081 | PinchTab up to 0.8.2 Internal Service /download validateDownloadURL server-side request forgery

VDB-352049 · CVE-2026-33081 · GCVE-0-2026-33081 PINCHTAB UP TO 0.8.2 INTERNAL SERVICE /DOWNLOAD VALIDATEDOWNLOADURL SERVER-SIDE REQUEST FORGERY HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.4 $0-$5k 2.02+ Summaryinfo A vulnerability was found in PinchTab up to 0.8.2. It has been classified as critical. Impacted is the function validateDownloadURL of the file /download of the component Internal Service. The manipulation leads to server-side request forgery. This vulnerability is traded as CVE-2026-33081. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended. Detailsinfo A vulnerability was found in PinchTab up to 0.8.2 and classified as critical. This issue affects the function validateDownloadURL of the file /download of the component Internal Service. The manipulation with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability. The summary by CVE is: 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. The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-33081 since 03/17/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. Upgrading to version 0.8.3 eliminates this vulnerability. Productinfo Name PinchTab Version 0.8.0 0.8.1 0.8.2 Website Product: https://github.com/pinchtab/pinchtab/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.6 VulDB Meta Temp Score: 6.4 VulDB Base Score: 7.3 VulDB Temp Score: 7.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 5.8 CNA Vector (GitHub_M): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Server-side request forgery CWE: CWE-918 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: PinchTab 0.8.3 Timelineinfo 03/17/2026 CVE reserved 03/20/2026 +3 days Advisory disclosed 03/20/2026 +0 days VulDB entry created 03/20/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Status: Confirmed CVE: CVE-2026-33081 (🔒) GCVE (CVE): GCVE-0-2026-33081 GCVE (VulDB): GCVE-100-352049 Entryinfo Created: 03/20/2026 11:02 Changes: 03/20/2026 11:02 (65) Complete: 🔍 Cache ID: 99:485:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸