What it is
CVE-2026-34486 is an unauthenticated vulnerability affecting Apache Software Foundation Apache Tomcat. Missing Encryption of Sensitive Data vulnerability in Apache Tomcat due to the fix for CVE-2026-29146 allowing the...
Vulnerability report
Exploited in the wild
Confirmed confidence
In CISA KEV
CVE-2026-34486
Apache Tomcat
Apache Software Foundation / Apache Tomcat · affected before *
- Severity
- CVSS 7.5 · High
- Confidence
- Confirmed
- Exploit status
- Exploited in the wild
- EPSS
- 82.9%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.
Who is affected?
Apache Software Foundation / Apache Tomcat affected before *.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
Apache Tomcat
Missing Encryption of Sensitive Data vulnerability in Apache Tomcat due to the fix for CVE-2026-29146 allowing the bypass of the EncryptInterceptor.
This issue affects Apache Tomcat: 11.0.20, 10.1.53, 9.0.116.
Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fix the issue.
Vendor
Product
Affected
Status
Red Hat
Red Hat Enterprise Linux 8
pki-deps:10.6/pki-servlet-engine
All versions (default: unaffected)
Unaffected
Apache Software Foundation
Apache Tomcat
11.0.20
Affected
Apache Software Foundation
Apache Tomcat
10.1.53
Affected
Apache Software Foundation
Apache Tomcat
9.0.116
Affected
- Published
- 09 Apr 2026
- Exploitation Reported
- 04 Aug 2026
- Attack vector
- Remote
- Complexity
- Low
- Privileges
- None
- User interaction
- None
Tags
apache
cisa
nuclei_scanner
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2026-34486
- Apache Mailing List lists.apache.org · Vendor Advisory https://lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly
Exploitation evidence
Why KEV Intelligence marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
CISA
Independent exploitation attestation added to the KEV Intelligence record.
Proof of concept available
Nuclei Templates
Public scanner or PoC coverage increases practical exploitability.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2026-08-04 16:45 UTC |
| CVE | 2026-08-04 18:20 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 0
- User-Agents
- 0
Raw values available in Pro and Enterprise.
Scanner coverage
Nuclei template detected 01 Jun 2026.
View Nuclei template (opens in new tab)Virtual patch status
No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →Scanner Artifacts
Scanner and exploit-framework references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-34486.yaml | 01 Jun 2026 |
Risk and context
Severity, weaknesses, and research context
CVSS v3.1
7.5
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
82.9%
Weaknesses
Recent mention · Tenable Blog
The Agentic AI threat cluster: Seven incidents, three actors, and what they mean for your exposure
Tenable’s Research Special Operations (RSO) team has been tracking a cluster of agentic AI threat activity since late July 2026. The Taiwan autonomous AI cyber attack confirmed what the cluster data already showed: near-autonomous offensive AI has crossed from theoretical risk...
Read full advisoryPotential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
CypherHippie/CVE-2026-34486---unauthenticated-RCE-via-Java-deserialization
github · Created 2026-08-19 00:39:18 UTC · 0 stars · AI assessment 90%
EncryptInterceptor fail-open bypass in Apache Tomcat Tribes clustering leading to unauthenticated RCE via Java deserialization.
Apache Tomcat Tribes EncryptInterceptor Bypass - Remote Code Execution
nuclei · Created Unknown
Timeline
From disclosure to observed exploitation
-
KEV confirmed by CVE
Exploitation attested by an external source
-
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
Public PoC available
Public proof-of-concept code published
-
Nuclei template available
Scanner coverage available
-
CVE published
Vulnerability disclosed publicly
-
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2026-34486
Free JSON includes basic KEV fields{
"cve_id": "CVE-2026-34486",
"confidence": "Confirmed",
"cvss_score": 7.5,
"cvss_estimated": false,
"epss_score": 0.82933,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}Early warning alerts
Get alerts on high-impact exploitation
Receive curator-selected alerts when exploitation activity warrants attention. Each alert includes the evidence and context needed to decide what requires attention now.