Race condition in the XMPP library in Smack before 4.1.9, when the SecurityMode.required…
Priority LOW 30CWE-362Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat.
Summary
Race condition in the XMPP library in Smack before 4.1.9, when the SecurityMode.required TLS setting has been set, allows man-in-the-middle attackers to bypass TLS protections and trigger use of cleartext for client authentication by stripping the "starttls" feature from a server response.
Why it matters now
EPSS 0.01513 74th percentileScored 2026-11-07
Fix Partial org.igniterealtime.smack:smack-core (Maven): 4.1.9Red Hat: 2 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | org.igniterealtime.smack:smack-core (Maven) | before 4.1.9 | 4.1.9 | Patch available | GHSA-66pq-hqv5-228g |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- org.igniterealtime.smack:smack-core (Maven) Vendor— Affected before 4.1.9 Fixed in 4.1.9 Patch available GHSA-66pq-hqv5-228g
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:igniterealtime:smack:*:*:*:*:*:*:*:* | before 4.1.9 | Vulnerable | igniterealtime |
| cpe:2.3:o:fedoraproject:fedora:25:*:*:*:*:*:*:* | 25 | Vulnerable | Fedoraproject |
- cpe:2.3:a:igniterealtime:smack:*:*:*:*:*:*:*:* Versions before 4.1.9 Vulnerable ·igniterealtime
- cpe:2.3:o:fedoraproject:fedora:25:*:*:*:*:*:*:* Versions 25 Vulnerable ·Fedoraproject
Remediation
- Fix · GHSA-66pq-hqv5-228g org.igniterealtime.smack:smack-core (Maven) Fixed in 4.1.9 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat JBoss BRMS 5 | Affected | No fix planned: Will not fix |
| Red Hat JBoss Fuse 6 | Affected | No fix planned: Will not fix |
Timeline
- 2026-10-02 Threatist record created from CVE-2016-10027
- 2026-10-03 Alias added: GHSA-66pq-hqv5-228g
References
Patch 3
Advisory 4
Sources
- CVE-2016-10027 · CVE Program
- CVE-2016-10027 · NVD
- FIRST EPSS
- GHSA-66pq-hqv5-228g · GitHub Advisory Database · CC BY 4.0
- CVE-2016-10027 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences