Description
Unsafe Deserialization vulnerability in Modular Max Serve before 25.6, specifically when the "--experimental-enable-kvcache-agent" feature is used allowing attackers to execute arbitrary code.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | max | < 25.6.0 | 25.6.0 | PYSEC-2025-253 |
| PyPI | modular | < 25.6.0 | 25.6.0 | GHSA-7xcv-9j6c-2fmc |
References
- https://github.com/modular/modular/issues/4795
- https://github.com/modular/modular/blame/main/max/serve/kvcache_agent/kvcache_agent.py#L220
- https://github.com/modular/modular/commit/10620059fb5c47fb0c30e5d21a8ff3b8d622fba4
- https://github.com/modular/modular/commit/ee9c4ab02345dd30bed8b79771b6909ff1b930a1
- https://github.com/modular/modular/commit/b20e749fa892dbe772e890a268002f732164d9f5
- https://www.oligo.security/blog/shadowmq-how-code-reuse-spread-critical-vulnerabilities-across-the-ai-ecosystem