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Vulnerability record · CVE-2026-25873 · published 18 March 2026

CVE-2026-25873: Deserialization of untrusted data vulnerability

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.

9.3 CVSS 4.0 Critical EPSS 1.5% · top 26.2% CWE-502 · Deserialization of untrusted data Awaiting Analysis
9.3CVSS 4.0 base score
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
7References
14 Jul 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://arxiv.org/abs/2506.18871
https://chocapikk.com/posts/2026/omnigen2-pickle-rce/
https://github.com/VectorSpaceLab/OmniGen2/blob/3a13017e532f9f309a38bca571fd62200a6415c5/OmniGen2-RL/reward_server/rewar
https://github.com/VectorSpaceLab/OmniGen2/blob/3a13017e532f9f309a38bca571fd62200a6415c5/OmniGen2-RL/reward_server/rewar
https://github.com/VectorSpaceLab/OmniGen2/blob/3a13017e532f9f309a38bca571fd62200a6415c5/OmniGen2-RL/reward_server/rewar
https://github.com/VectorSpaceLab/OmniGen2/pull/139
https://www.vulncheck.com/advisories/omnigen2-rl-reward-server-unsafe-deserialization-rce

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Source: NIST National Vulnerability Database (record CVE-2026-25873), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.