Vulnerability · CVE-2022-26134

Atlassian Confluence Server and Data Center Remote Code Execution Vulnerability

Published Mar 6, 2022 · catalog updated Jun 16, 2026 · Atlassian Confluence Server and Data Center

Patch now

CVE-2022-26134 is in the CISA known-exploited catalog, due Jun 6, 2022. Confirm Atlassian Confluence Server and Data Center against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity: Critical9.8
Known exploitation: CISA KEV and VulnCheck KEV
EPSS: 100.00%
Remediation: Remediation guidance
Affected products: cpe atlassian/confluence data center · cpe atlassian/confluence server · vendor Atlassian Confluence Server and Data Center · vendor Atlassian Confluence Server/Data Center

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

cpe atlassian/confluence data center7.18.0
cpe atlassian/confluence serverversion unspecified
vendor Atlassian Confluence Server and Data Centerversion unspecified
vendor Atlassian Confluence Server/Data Centerversion unspecified

How to fix CVE-2022-26134

Recommended remediation
Immediately block all internet traffic to and from affected products AND apply the update per vendor instructions [https://confluence.atlassian.com/doc/confluence-security-advisory-2022-06-02-1130377146.html] OR remove the affected products by the due date on the right. Note: Once the update is successfully deployed, agencies can reassess the internet blocking rules. CISA due date Jun 6, 2022.
Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Which versions are affected?

Compare what you have installed with atlassian/confluence data center 7.18.0. Immediately block all internet traffic to and from affected products AND apply the update per vendor instructions [https://confluence.atlassian.com/doc/confluence-security-advisory-2022-06-02-1130377146.html] OR remove the affected products by the due date on the right. Note: Once the update is successfully deployed, agencies can reassess the internet blocking rules.

What should an analyst verify?

CWE-917: Expression Language Injection. EPSS 100.00%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

Jun 2, 2022 · Catalog
Detected
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
Jun 2, 2022 · CISA KEV
Known exploited
Immediately block all internet traffic to and from affected products AND apply the update per vendor instructions [https://confluence.atlassian.com/doc/confluence-security-advisory-2022-06-02-1130377146.html] OR remove the affected products by the due date on the right. Note: Once the update is successfully deployed, agencies can reassess the internet blocking rules.
Jun 6, 2022 · CISA KEV
Remediation due
Immediately block all internet traffic to and from affected products AND apply the update per vendor instructions [https://confluence.atlassian.com/doc/confluence-security-advisory-2022-06-02-1130377146.html] OR remove the affected products by the due date on the right. Note: Once the update is successfully deployed, agencies can reassess the internet blocking rules.
Jun 16, 2026 · Catalog
Updated
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

Sources

CISA KEVConfirmed exploitationCVE-2022-26134
Atlassian Confluence Server and Data Center contain a remote code execution vulnerability that allows for an unauthenticated attacker to perform remote code execution.
cisa.gov
CVE.orgVulnerability recordCVE-2022-26134
Official CVE identifier
cve.org
FIRST EPSSExploitation probabilityCVE-2022-26134
30-day exploitation probability 100.0%
first.org
Exploit DatabasePublic exploit reference50952
Public archive entry. The exploit body is not stored here.
exploit-db.com
Metasploit ModulesPublic exploit moduleexploit_multi/http/atlassian_confluence_namespace_ognl_injection
Public module reference (excellent). Module source is not copied into this catalog.
rapid7.com
NIST NVDVulnerability recordCVE-2022-26134
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
nvd.nist.gov
Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/167430/Confluence-OGNL-Injection-Remote-Code-Execution.html
Packet Storm link already published on the finding.
packetstormsecurity.com
Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/167431/Through-The-Wire-CVE-2022-26134-Confluence-Proof-Of-Concept.html
Packet Storm link already published on the finding.
packetstormsecurity.com
Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/167432/Confluence-OGNL-Injection-Proof-Of-Concept.html
Packet Storm link already published on the finding.
packetstormsecurity.com
Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/167449/Atlassian-Confluence-Namespace-OGNL-Injection.html
Packet Storm link already published on the finding.
packetstormsecurity.com
VulnCheck KEVConfirmed exploitationCVE-2022-26134
Atlassian Confluence Server and Data Center contain a remote code execution vulnerability that allows for an unauthenticated attacker to perform remote code execution.
vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

Priority score

75/100

Evidence confidence: Very high

CISA lists this vulnerability as known to be exploited.

Confirmed exploitation30/30
EPSS probability20/20
CVSS severity15/15
Public exploit10/10
Internet exposure0/10
Product prevalence0/5
Threat research0/5

Decision signals

Four separate signals — do not infer one from another.

Critical

CVSS severity
9.8 v3.1
Technical impact. Separate from exploitation likelihood.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS probability
100.00% · p99.99%
Estimated probability of exploitation within 30 days (FIRST).
Known exploitation
Yes · CISA KEV and VulnCheck KEV
CISA KEV since Mar 6, 2022. Ransomware use: Known.
Patch availability
Remediation guidance
Immediately block all internet traffic to and from affected products AND apply the update per vendor instructions [https://confluence.atlassian.com/doc/confluence-security-advisory-2022-06-02-1130377146.html] OR remove the affected products by the due date on the right. Note: Once the update is successfully deployed, agencies can reassess the internet blocking rules.

Stacks

Atlassian Confluence

Weakness

CWE-917
Expression Language Injection
MITRE definition

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