CVE-2011-5034

Status: ModifiedHigh (7.8)—
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.
CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C
Base score: 7.8
Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 81%
Percentile among all scored CVEs: 100
Score date: 10/2/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (1)

Apache — Geronimo
CWEs

CWE-20
References

Raw JSON (NVD)

Show
{
  "id": "CVE-2011-5034",
  "cveTags": [],
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        "source": "nvd@nist.gov",
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          "baseScore": 7.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 6.9,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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          "versions": [
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  "published": "2011-12-30T01:55:01.610",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-20"
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  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Apache Geronimo v2.2.1 y anteriores calcula los valores hash de los parámetros de forma, sin restringir la capacidad de desencadenar colisiones hash predecible, lo que permite a atacantes remotos provocar una denegación de servicio (consumo de CPU) mediante el envío de gran cantidad de parámetros a mano. NOTA: este podría superponerse CVE-2011-4461."
    }
  ],
  "lastModified": "2026-06-16T23:35:48.793",
  "configurations": [
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}