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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.

PUBLISHED Reserved 2026-04-22 | Published 2026-04-23 | Updated 2026-04-23 | Assigner VulDB




MEDIUM: 6.3CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
MEDIUM: 5.6CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
MEDIUM: 5.6CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
5.1AV:N/AC:H/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR

Problem types

Sandbox Issue

Improper Access Controls

Product status

0.1
affected

0.2
affected

0.3
affected

0.4
affected

0.5
affected

0.6
affected

0.7.0
affected

Timeline

2026-04-22:Advisory disclosed
2026-04-22:VulDB entry created
2026-04-22:VulDB entry last update

Credits

ZAST.AI (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/359040 (VDB-359040 | ByteDance verl grader.py math_equal sandbox) vdb-entry technical-description

vuldb.com/vuln/359040/cti (VDB-359040 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/submit/795257 (Submit #795257 | Bytedance verl <=0.7.0 Arbitrary Code Execution) third-party-advisory

github.com/...bility-reports/blob/main/bytedance/verl_rce.md exploit

cve.org (CVE-2026-6878)

nvd.nist.gov (CVE-2026-6878)

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