TI-2026-06033 Aliases CVE-2026-6878 GHSA-h57c-v2v3-5v3v

ByteDance verl grader.py math_equal sandbox

MEDIUM 61CWE-264Published 2026-04-23 · Updated 2026-04-23

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Attack requirements: None
Impact type: Security bypass, Code execution
Confidentiality · integrity · availability: Low · Low · Low
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-264 and CWE-95.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00333 26th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
ByteDance	verl	0.1; 0.2; 0.3; 0.4; 0.5; 0.6; 0.7.0	—	No fix listed	CNA
—	verl (PyPI)	up to 0.7.1	—	No fix listed	GHSA-h57c-v2v3-5v3v

verl VendorByteDance Affected 0.1; 0.2; 0.3; 0.4; 0.5; 0.6; 0.7.0 Fixed in — No fix listed CNA
verl (PyPI) Vendor— Affected up to 0.7.1 Fixed in — No fix listed GHSA-h57c-v2v3-5v3v

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-6878
2026-10-03 Alias added: GHSA-h57c-v2v3-5v3v

References

Exploit 1

https://github.com/zast-ai/vulnerability-reports/blob/main/bytedance/verl_rce.md

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-6878

Other 2

TI-2026-29265 ByteDance DeerFlow Path Traversal and Arbitrary File Write via Bootstrap Mode CVSS 4.0HIGH 7.1
TI-2026-63838 ByteDance Coze Scraper Extension External Message index.js chrome.runtime.onMessageExternal.addListener authorization CVSS 4.0MEDIUM 5.3
TI-2026-06147 ByteDance coze-studio databaseTool database_impl.go ExecuteSQL sql injection CVSS 4.0MEDIUM 5.3
TI-2026-09770 bytedance InfiniStore KV Map infinistore.h purge_kv_map algorithmic complexity CVSS 4.0MEDIUM 4.8
TI-2026-56382 Missing authentication in ByteDance UI-TARS-desktop CVSS 4.0CRITICAL 10.0
TI-2026-26705 ByteDance DeerFlow LocalSandboxProvider Host Bash Escape CVSS 4.0HIGH 8.6

See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences