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Description

OmniGen2-RL contains an unauthenticated remote code execution vulnerability in the reward server component that allows remote attackers to execute arbitrary commands by sending malicious HTTP POST requests. Attackers can exploit insecure pickle deserialization of request bodies to achieve code execution on the host system running the exposed service.

PUBLISHED Reserved 2026-02-06 | Published 2026-03-18 | Updated 2026-03-19 | Assigner VulnCheck




CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

CWE-502 Deserialization of Untrusted Data

Product status

Default status
unknown

Any version
affected

Credits

Valentin Lobstein (Chocapikk) finder

References

github.com/VectorSpaceLab/OmniGen2/pull/139 patch

chocapikk.com/posts/2026/omnigen2-pickle-rce/ technical-description exploit

arxiv.org/abs/2506.18871 product

github.com/...5c5/OmniGen2-RL/reward_server/reward_server.py related

github.com/...15c5/OmniGen2-RL/reward_server/reward_proxy.py related

github.com/...15c5/OmniGen2-RL/reward_server/reward_proxy.py related

www.vulncheck.com/...eward-server-unsafe-deserialization-rce third-party-advisory

cve.org (CVE-2026-25873)

nvd.nist.gov (CVE-2026-25873)

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