CVE-2026-123783

HIGH
MEDIUM Priority: 0.05 BB Relevance: 68/100
Published: 2026-11-06 Modified: 2026-11-06 First seen: 2026-11-06 Status: active

Attack Surface

Network Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: X
AT: None
VC: High
VI: High
VA: High

Description

Skyvern through 1.0.56 contains a sandbox bypass vulnerability that allows authenticated users to execute code by reconstructing functions from raw bytecode with types.CodeType. Attackers can deploy scripts that evade the is_safe_script_code AST denylist and import blocked modules such as subprocess or socket to run code in the Skyvern server process.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
Skyvern-AI skyvern 0
Skyvern-AI skyvern 0

Bug Bounty Relevance

68 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

8.7 / 10.0 v4.0
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:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.56%
Raw Score 0.005570
Percentile 47.0%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00557
2026-11-12
0.00557
2026-11-10
0.00557
2026-11-09
0.00557
2026-11-08
0.00557
2026-11-07
0.00557

Intelligence Sources

mitre ref →
nvd ref →