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CVE-2025-60455 — Vulnerability in modular — CVE Details

CRITICAL

Modular Max Serve has Unsafe Deserialization vulnerability

Published November 18, 2025Updated July 13, 2026Source: osv

Summary

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.

Advisory Timeline

  • First published November 18, 2025 (328 days ago).
  • Last revised July 13, 2026 — 236 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

pip
Update modular to 25.6.0 or later
pip install "modular>=25.6.0"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: pypi (1).

PackageEcosystemAffectedFixed In
modular
pypi
25.3.0, 25.4.0, 25.5.025.6.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-502
    Deserialization of Untrusted DataMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
—
Confidentiality
—
Integrity
—
Availability
—

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

References

Frequently Asked Questions

What is CVE-2025-60455?
Modular Max Serve has Unsafe Deserialization vulnerability This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2025-60455?
CVE-2025-60455 affects modular. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2025-60455 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-7xcv-9j6c-2fmc
PYSEC-2025-253
PYSEC-2026-427

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