CVE Catalog

CVE-2026-6878

MediumCVSS 5.6
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.33%

27th percentile - higher than 27% of all known CVEs

Summary

A vulnerability was identified in ByteDance verl up to 0.7.0 in the math_equal function of prime_math/grader.py. Manipulation leads to a sandbox issue. The attack can be initiated remotely, though complexity is high and exploitability is difficult; a public exploit exists.

Risk Assessment

Sandbox mechanisms may be bypassed, allowing unauthorized operations in the grading environment. Risk is limited by high attack complexity, but the public exploit increases exposure.

Recommendation

Update verl beyond 0.7.0 if a fix is available, or limit exposure of the grading function. Consider additional isolation layers for environments running the grader.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS