CVE-2021-22119Network attack vector

Service interruption via unbounded authorization-request storage

Published Jun 29, 2021 · Updated Aug 3, 2024

Resource exhaustion in affected Spring Security releases allows remote attackers to interrupt OAuth 2.0 client application services. The session repositories store each initiated Authorization Code request in an unbounded map, allowing repeated requests to retain objects until resources are exhausted. The application must use the Servlet or Reactive session-backed authorization-request repository; no authentication or user interaction is required.

CVSS severity7.5
High
EPSS probability6.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in affected Spring Security releases allows remote attackers to interrupt OAuth 2.0 client application services. The session repositories store each initiated Authorization Code request in an unbounded map, allowing repeated requests to retain objects until resources are exhausted. The application must use the Servlet or Reactive session-backed authorization-request repository; no authentication or user interaction is required.

The record

CVE
CVE-2021-22119
Published
Jun 29, 2021
Updated
Aug 3, 2024
Vendor
Spring
Product
Spring Security
Classifications
CWE-863, CWE-400, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 29, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Spring Security versions 5.5.x prior to 5.5.1, 5.4.x prior to 5.4.7, 5.3.x prior to 5.3.10 and 5.2.x prior to 5.2.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Spring · Spring Securityversion=Spring Security versions 5.5.x prior to 5.5.1, 5.4.x prior to 5.4.7, 5.3.x prior to 5.3.10 and 5.2.x prior to 5.2.11

Published CVSS scores

7.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
CWE-400Uncontrolled Resource Consumption
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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