CVE-2025-53605 — Crash due to uncontrolled recursion in protobuf —...

MEDIUM

Crash due to uncontrolled recursion in protobuf crate

Published March 7, 2025Updated September 10, 2026Source: osv

Summary

Affected version of this crate did not properly parse unknown fields when parsing a user-supplied input. This allows an attacker to cause a stack overflow when parsing the message on untrusted data.

Advisory Timeline

First published March 7, 2025 (584 days ago).
Last revised September 10, 2026 — 551 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Cargo

Update protobuf to 3.7.2 or later

cargo update -p protobuf --precise 3.7.2

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

Affected Packages (1)

Affects 1 ecosystem: crates.io (1).

Package	Ecosystem	Affected	Fixed In
protobuf	crates.io	All versions	3.7.2

Vulnerability Classification

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

CWE-20
Improper Input ValidationMITRE
CWE-770
Allocation of Resources Without LimitsMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 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:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U

References

Frequently Asked Questions

What is CVE-2025-53605?: Crash due to uncontrolled recursion in protobuf crate This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2025-53605?: CVE-2025-53605 affects protobuf. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2025-53605 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

7.5

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-2gh3-rmm4-6rq5

RUSTSEC-2024-0437

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Out of Memory in stream::read_raw_bytes_into()
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Russh: Unbounded memory exhaustion via CHANNEL_OPEN flood during a client-stalled rekey
CVE-2026-102820
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pageant: Out-of-bounds read / oversized allocation in `pageant` MemoryMap::read via a malicious Pageant agent (Windows)

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