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TI-2021-17305 Aliases CVE-2021-40110GHSA-r58x-wjg8-63m9

Apache James IMAP vulnerable to a ReDoS

Priority LOW 38Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

In Apache James, using Jazzer fuzzer, we identified that an IMAP user can craft IMAP LIST commands to orchestrate a Denial Of Service using a vulnerable Regular expression. This affected Apache James prior to 3.6.1 We recommend upgrading to Apache James 3.6.1 or higher , which enforce the use of RE2J regular expression engine to execute regex in linear time without back-tracking.

Why it matters now

EPSS 0.02954 87th percentileScored 2026-11-07
Fix Fixed org.apache.james:james-server (Maven): 3.6.1

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache JamesApache James – 3.6.0—No fix listedCNA
—org.apache.james:james-server (Maven)3.1.0 to before 3.6.13.6.1Patch availableGHSA-r58x-wjg8-63m9
  • Apache James VendorApache Affected Apache James – 3.6.0 Fixed in — No fix listed CNA
  • org.apache.james:james-server (Maven) Vendor— Affected 3.1.0 to before 3.6.1 Fixed in 3.6.1 Patch available GHSA-r58x-wjg8-63m9

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:james:*:*:*:*:*:*:*:*before 3.6.1VulnerableApache
  • cpe:2.3:a:apache:james:*:*:*:*:*:*:*:* Versions before 3.6.1 Vulnerable ·Apache

Remediation

  • Fix · GHSA-r58x-wjg8-63m9 org.apache.james:james-server (Maven) Fixed in 3.6.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-40110
  2. 2026-10-03 Alias added: GHSA-r58x-wjg8-63m9

References

Advisory 3

  • TI-2019-00201 XML external entity injection in Apache PDFBox CVSS 3.1CRITICAL 9.8
  • TI-2023-28170 Apache James server: Privilege escalation via JMX pre-authentication deserialisation CVSS 3.1CRITICAL 9.8
  • TI-2021-17565 Sieve file storage vulnerable to path traversal attacks CVSS 3.1CRITICAL 9.1
  • TI-2006-02714 The SMTP server in Apache Java Mail Enterprise Server (aka Apache James) 2.2.0 allows… CVSS 2.0HIGH 7.8
  • TI-2023-11431 Apache James server: Privilege escalation through unauthenticated JMX CVSS 3.1HIGH 7.8
  • TI-2022-11006 STARTTLS command injection in Apache JAMES CVSS 3.1HIGH 7.5
See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences