RCE in Atlassian Confluence Data Center
CVE-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…
Vulnerability class: Log4Shell (CVE-2021-44228)
EPSS: 1.000 (100.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Atlassian Confluence Data Center — versions next of 1.3.0, unspecified, 7.13.0
- Atlassian Confluence_data_center — versions 7.18.0
- Atlassian Confluence Server — versions next of 1.3.0, unspecified, 7.13.0
- Atlassian Confluence_server — versions 7.18.0
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: 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.
Known ransomware campaign use: yes.
Public proof-of-concept exploits
References
- security@atlassian.com (Patch, x_refsource_MISC, Issue Tracking, Vendor Advisory)
- security@atlassian.com (VDB Entry, Third Party Advisory, x_refsource_MISC)
- security@atlassian.com (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
- security@atlassian.com (VDB Entry, Third Party Advisory, x_refsource_MISC)
- security@atlassian.com (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
- security@atlassian.com (x_refsource_MISC, Vendor Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2022-26134?
- CVE-2022-26134 is a critical-severity vulnerability in Atlassian Confluence Data Center, classified under Improper Neutralization of Special Elements used in an Expression Language Statement (Expression Language Injection). CVSS score: 9.8/10. Published 2022-06-03.
- How severe is CVE-2022-26134?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2022-26134 known to be exploited?
- Yes. CVE-2022-26134 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-06-02), indicating it is being actively exploited. 300 public proof-of-concept repositories are indexed.