CVE-2026-6878

ByteDance verl grader.py math_equal sandbox

Medium · published April 23, 2026

CVSS v4.0
6.3
EPSS
0%
Percentile
35.5
In the wild
Unconfirmed
What it is

A vulnerability was identified in ByteDance verl up to 0.7.0. Affected is the function math_equal of the file prime_math/grader.py. The manipulation leads to sandbox issue. It is possible to initiate the attack remotely. The complexity of an attack is rather high. The exploitability is told to be difficult. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

The record
Technical detail
CVSS v4.0
6.3 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
EPSS
0.00422 · 35.5th percentile
Published
2026-04-23T00:00Z
EPSS history
Timeline
  • 23 APR 00:00Z
    ByteDance verl grader.py math_equal sandbox
    cvelistv5