What is the CVSS score of CVE-2022-26134?

CVE-2022-26134 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 100.0%.

Is there a public PoC exploit available for CVE-2022-26134?

Yes, a public proof-of-concept exploit is available for CVE-2022-26134. Prioritise patching immediately. EPSS: 100.0%.

Is there a patch available for CVE-2022-26134?

Yes, a patch is available for CVE-2022-26134. Update the affected software to the latest version immediately.

Confluence Server CVE-2022-26134

CRITICAL

Improper Neutralization of Special Elements used in an Expression Language Statement (CWE-917)

2022-06-03 security@atlassian.com

RCE Atlassian Confluence Data Center Confluence Server

9.8

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-917 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V1 - Encoding and Sanitization Expression language sanitization
Impact	CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system.

Act Now Prioritize within 24-48h. Why: In CISA KEV with patch available.

Exploited in the wild (CISA KEV) Patch available 100.0% exploitation probability (EPSS)

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AnalysisAI

In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-917. In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are from 1.3.0 before 7.4.17, from 7.13.0 before 7.13.7, from 7.14.0 before 7.14.3, from 7.15.0 before 7.15.2, from 7.16.0 before 7.16.4, from 7.17.0 before 7.17.4, and from 7.18.0 before 7.18.1. Affected products include: Atlassian Confluence Data Center, Atlassian Confluence Server. Version information: before 7.4.17.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Added to CISA KEV

Jul 14, 2026 - 04:22 CISA

CVE Published

Jun 03, 2022 - 22:15 nvd

CRITICAL 9.8

DescriptionNVD

In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are from 1.3.0 before 7.4.17, from 7.13.0 before 7.13.7, from 7.14.0 before 7.14.3, from 7.15.0 before 7.15.2, from 7.16.0 before 7.16.4, from 7.17.0 before 7.17.4, and from 7.18.0 before 7.18.1.

Threat Intelligence Overview

EPSS Score

100.0%

Top 0% exploitable

EUVD KEV

Listed

EU Exploited Vulnerability

Exploit

POC

Public exploit code exists

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

CISA KEV

EPSS POC (2) CIRCL

Exploit-DB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV Yes

Public POC Yes

EPSS 100.0%

Patch available Yes

Active threat Yes

Deciding rule

In CISA KEV with patch available

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Immediate

Exploitation· derived

Active

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact· derived

High

Priority Score

234

Low Medium High Critical

KEV: +50

EPSS: +100

CVSS: +49

PoC: +20

Weaponized: +15

Threat intel: 0

Gov advisory: 0

Attack Technique

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)NVD

cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*

cpe:2.3:a:atlassian:confluence_data_center:7.18.0:*:*:*:*:*:*:*

cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*

cpe:2.3:a:atlassian:confluence_server:7.18.0:*:*:*:*:*:*:*

More in Confluence Server

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CVE-2012-2926 CRITICAL Act Now POC

9.1 May 22

Atlassian JIRA before 5.0.1; Confluence before 3.5.16, 4.0 before 4.0.7, and 4.1 before 4.1.10; FishEye and Crucible bef

CVE-2023-22518 CRITICAL Emergency POC

9.8 Oct 31

All versions of Confluence Data Center and Server are affected by this unexploited vulnerability. Rated critical severit

CVE-2024-21683 HIGH Act Now POC

8.8 May 21

This High severity RCE (Remote Code Execution) vulnerability was introduced in version 5.2 of Confluence Data Center and

CVE-2019-3398 HIGH This Week POC

8.8 Apr 18

Confluence Server and Data Center had a path traversal vulnerability in the downloadallattachments resource. Rated high

CVE-2017-7415 HIGH This Week POC

7.5 Apr 27

Atlassian Confluence 6.x before 6.0.7 allows remote attackers to bypass authentication and read any blog or page via the

CVE-2012-6342 MEDIUM This Month POC

6.8 May 13

Cross-site request forgery (CSRF) vulnerability in logout.action in Atlassian Confluence 3.4.6 allows remote attackers t

CVE-2022-26136 CRITICAL Act Now

9.8 Jul 20

A vulnerability in multiple Atlassian products allows a remote, unauthenticated attacker to bypass Servlet Filters used

CVE-2019-3395 CRITICAL Act Now

9.8 Mar 25

The WebDAV endpoint in Atlassian Confluence Server and Data Center before version 6.6.7 (the fixed version for 6.6.x), f

CVE-2021-26085 MEDIUM This Month POC

5.3 Aug 03

Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a Pre-Authoriza

CVE-2024-21677 HIGH This Week

8.8 Mar 19

This High severity Path Traversal vulnerability was introduced in version 6.13.0 of Confluence Data Center. Rated high s

CVE-2024-21673 HIGH This Week

8.8 Jan 16

This High severity Remote Code Execution (RCE) vulnerability was introduced in versions 7.13.0 of Confluence Data Center

CVE-2024-21672 HIGH This Week

8.8 Jan 16

This High severity Remote Code Execution (RCE) vulnerability was introduced in version 2.1.0 of Confluence Data Center a

Same weakness CWE-917 – Improper Neutralization of Special Elements used in an Expression Language Statement

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CVE-2020-17530 CRITICAL POC

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CVE-2020-10199 HIGH POC

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CVE-2023-27821 CRITICAL POC

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CVE-2022-23463 CRITICAL POC

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CVE-2018-12532 CRITICAL POC

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CVE-2017-7269 CRITICAL POC

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CVE-2022-47966 CRITICAL POC

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CVE-2012-4681 CRITICAL POC

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CVE-2023-3519 CRITICAL POC

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CVE-2015-5119 CRITICAL POC

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CVE-2016-4117 CRITICAL POC

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CVE-2015-3113 CRITICAL POC

9.8

References

Advisories & patches

PATCH https://jira.atlassian.com/browse/CONFSERVER-79016 ADVISORY https://confluence.atlassian.com/doc/confluence-security-advisory-2022-06-02-1130377146.html REF http://packetstormsecurity.com/files/167431/Through-The-Wire-CVE-2022-26134-Confluence-Proof-Of-Concept.html REF http://packetstormsecurity.com/files/167432/Confluence-OGNL-Injection-Proof-Of-Concept.html REF https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26134

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