← Vulnerability feed

Vulnerability record · CVE-2026-82447 · published 29 August 2026

CVE-2026-82447: Skyvern before 1.0.45 contains a sandbox escape vulnerability in TextPromptBlock that renders prompts twice, f…

Skyvern before 1.0.45 contains a sandbox escape vulnerability in TextPromptBlock that renders prompts twice, first through a sandboxed Jinja environment and then through an unsandboxed environment. Attackers can inject malicious Jinja template syntax through workflow parameters or upstream block output to execute arbitrary code with server process privileges.

8.7 CVSS 4.0 High EPSS 0.78% · top 46.0% CWE-1336 · CWE-1336 Deferred
8.7CVSS 4.0 base score
0.78%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
23 Sep 2026Last modified by NVD

Description

Skyvern before 1.0.45 contains a sandbox escape vulnerability in TextPromptBlock that renders prompts twice, first through a sandboxed Jinja environment and then through an unsandboxed environment. Attackers can inject malicious Jinja template syntax through workflow parameters or upstream block output to execute arbitrary code with server process privileges.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/Skyvern-AI/skyvern
https://github.com/Skyvern-AI/skyvern/blob/v1.0.44/skyvern/forge/sdk/prompting.py
https://github.com/Skyvern-AI/skyvern/blob/v1.0.44/skyvern/forge/sdk/workflow/models/block.py
https://github.com/Skyvern-AI/skyvern/commit/d723de621d5b3a340f3cc4d5b46bfe40a9a3124e
https://www.vulncheck.com/advisories/skyvern-before-1.0.45-sandbox-escape-via-textpromptblock

Track CVE-2026-82447 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2026-75650Adobe Commerce template engine flaw allows unauthenticated remote code executionAdobe Commerce, Commerce B2B and Magento are affected by improper neutralization of special elements used in a template engine (CWE-1336), allowing a…KEVEPSS 3.9%analysed9.8CVE-2024-23692Rejetto HTTP File Server template injection leads to unauthenticated RCERejetto HTTP File Server through version 2.3m is vulnerable to template injection, allowing a remote unauthenticated attacker to execute arbitrary co…KEVEPSS 99%analysed10.0CVE-2024-4040CrushFTP server-side template injection enables unauthenticated sandbox escape and RCECrushFTP versions before 10.7.1 and 11.1.0 contain a server-side template injection flaw that lets unauthenticated remote attackers escape the VFS sa…KEVEPSS 100%analysed

Source: NIST National Vulnerability Database (record CVE-2026-82447), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.