medium5.6
CVE-2026-6878
verl's math_equal() Vulnerable to Arbitrary Code Execution via Unsafe eval()
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | verl | <= 0.7.1 | none recorded |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-h57c-v2v3-5v3v
- https://nvd.nist.gov/vuln/detail/CVE-2026-6878
- https://github.com/zast-ai/vulnerability-reports/blob/main/bytedance/verl_rce.md
- https://vuldb.com/submit/795257
- https://vuldb.com/vuln/359040
- https://vuldb.com/vuln/359040/cti
- https://github.com/verl-project/verl/blob/v0.7.1/verl/utils/reward_score/prime_math/grader.py