CVE-2026-108771: Missing authentication for in-house broadcast and polymorphic deserialization vulnerability in
Source GCVE Database
Not known to be exploited · CVSS 9.8 Critical · fixed in 5.0.5 : patch Apache Kylin as a priority.
Data as of 30 Oct 2026, 21:06 UTC
Thin evidence
One scorer or none| CISA-ADP | CVSS 3.1 | 9.8 |
|---|
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.0.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 19 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Apache Software FoundationApache Kylin | Affected
| Fixed in– |
Mavenorg.apache.kylin/kylinpkg:maven/org.apache.kylin/kylinOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Users should upgrade Apache Kylin to version 5.0.5 or later, where this vulnerability is fixed. Since the issue primarily affects services exposed to public networks, limiting exposure and network access can reduce risk until the upgrade is applied.
Description
Apache Kylin versions from 4.0.0 through 5.0.4 contain a critical vulnerability involving missing authentication for an in-house broadcast feature combined with a polymorphic deserialization flaw. This vulnerability primarily impacts Kylin services exposed directly to public networks, which is uncommon in typical in-house deployments. The issue is resolved in version 5.0.5.