PT-2026-53509 · Pypi · Modula

Published 2026-06-29 · Updated 2026-06-29

OSV

CVSS v4.0

9.3

Critical

Base vector

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

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.

Fix

Related Identifiers

PYSEC-2026-427

Affected Products

Modula

References · 11

• https://nvd.nist.gov/vuln/detail/CVE-2025-60455 · Security Note
• https://osv.dev/vulnerability/PYSEC-2026-427 · Vendor Advisory
• https://github.com/modular/modular/commit/10620059fb5c47fb0c30e5d21a8ff3b8d622fba4 · Note
• https://github.com/modular/modular · Note
• https://github.com/modular/modular/issues/4795 · Note
• https://github.com/modular/modular/commit/b20e749fa892dbe772e890a268002f732164d9f5 · Note
• https://github.com/modular/modular/commit/ee9c4ab02345dd30bed8b79771b6909ff1b930a1 · Note
• https://github.com/modular/modular/blame/main/max/serve/kvcache_agent/kvcache_agent.py#L220 · Note
• https://github.com/advisories/GHSA-7xcv-9j6c-2fmc · Note
• https://oligo.security/blog/shadowmq-how-code-reuse-spread-critical-vulnerabilities-across-the-ai-ecosystem · Note
• https://pypi.org/project/modular · Note