verl's math_equal() Vulnerable to Arbitrary Code Execution via Unsafe eval()

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.0033, the 26th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 14:59 UTC First seen by agentprime
2. 31 Oct 2026, 14:59 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-h57c-v2v3-5v3v
• OSV: GHSA-h57c-v2v3-5v3v
• nvd.nist.gov/vuln/detail/CVE-2026-6878
• github.com/verl-project/verl
• github.com/verl-project/verl/blob/v0.7.1/verl/utils/reward_score/prime_math/grader.py
• github.com/zast-ai/vulnerability-reports/blob/main/bytedance/verl_rce.md
• vuldb.com/submit/795257
• vuldb.com/vuln/359040
• vuldb.com/vuln/359040/cti

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.