CVE-2026-6878

MEDIUM 5.6

ByteDance verl grader.py math_equal sandbox

CVSS Score

5.6

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-265 CWE-264
Vendor	bytedance
Product	verl
Published	Apr 23, 2026

Stay Ahead of the Next One

Get instant alerts for bytedance verl

Be the first to know when new medium vulnerabilities affecting bytedance verl are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

ByteDance / verl

0.1 0.2 0.3 0.4 0.5 0.6 0.7.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/359040 vuldb.com: https://vuldb.com/vuln/359040/cti vuldb.com: https://vuldb.com/submit/795257 github.com: https://github.com/zast-ai/vulnerability-reports/blob/main/bytedance/verl_rce.md

Credits

🔍 ZAST.AI (VulDB User) VulDB CNA Team