CVE-2026-6878: Sandbox Issue in ByteDance verl
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.
AI Analysis
Technical Summary
This vulnerability in ByteDance verl (up to version 0.7.0) involves a sandbox escape issue caused by manipulation of the math_equal function in prime_math/grader.py. The flaw allows remote attackers to bypass sandbox restrictions under conditions of high attack complexity and difficult exploitability. Despite the existence of a public exploit, no vendor response or patch has been provided. The CVSS 4.0 base score is 6.3, reflecting a medium severity with network attack vector, high attack complexity, and no privileges or user interaction required.
Potential Impact
The vulnerability could allow a remote attacker to escape the sandbox environment, potentially leading to unauthorized code execution or access beyond intended restrictions. However, the high complexity and difficult exploitability reduce the likelihood of widespread exploitation. No known exploits in the wild have been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vendor has not responded and no official fix is available, users should consider restricting exposure of the affected versions and monitor for updates from ByteDance. Avoid deploying affected versions in sensitive environments until a fix is released.
CVE-2026-6878: Sandbox Issue in ByteDance verl
Description
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.
CVSS v4.0
Score 6.3medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in ByteDance verl (up to version 0.7.0) involves a sandbox escape issue caused by manipulation of the math_equal function in prime_math/grader.py. The flaw allows remote attackers to bypass sandbox restrictions under conditions of high attack complexity and difficult exploitability. Despite the existence of a public exploit, no vendor response or patch has been provided. The CVSS 4.0 base score is 6.3, reflecting a medium severity with network attack vector, high attack complexity, and no privileges or user interaction required.
Potential Impact
The vulnerability could allow a remote attacker to escape the sandbox environment, potentially leading to unauthorized code execution or access beyond intended restrictions. However, the high complexity and difficult exploitability reduce the likelihood of widespread exploitation. No known exploits in the wild have been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vendor has not responded and no official fix is available, users should consider restricting exposure of the affected versions and monitor for updates from ByteDance. Avoid deploying affected versions in sensitive environments until a fix is released.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-04-22T18:22:59.992Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69ea193c87115cfb681377a4
Added to database: 4/23/2026, 1:06:04 PM
Last enriched: 4/23/2026, 1:21:01 PM
Last updated: 6/7/2026, 10:14:57 AM
Views: 126
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