CVE-2011-5034

What it is

Apache Geronimo 2.2.1 and earlier computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters. NOTE: this might overlap CVE-2011-4461.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

80.6% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2011-12-29 00:00 UTC ReservedThe CVE id was reserved by its CNA
2. 2011-12-30 01:55 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2026-06-16 23:35 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 80.6% in the next 30 days (EPSS).
• Severity: 7.8 HIGH (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2011-12-30 01:55 UTC

Last modified

2026-06-16 23:35 UTC

Exploit probability

80.6% · EPSS, next 30 days

Weakness

CWE-20 · Improper input validation

Record status

Modified

Affected

• Apache Geronimo ≤ 2.2.1
• Apache Geronimo 1.0
• Apache Geronimo 1.1
• Apache Geronimo 1.1.1
• Apache Geronimo 1.2
• Apache Geronimo 2.0.1
• Apache Geronimo 2.0.2
• Apache Geronimo 2.1

Attack profile CVSS 2.0 · 7.8

Attack vector

Network

Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

Is it in your code?

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