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CVE-2026-34486

INDEX BUILT · 2026-09-20

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Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor

CVE-2026-344864 of 4 sources documented this
84

rank 84 = 40 + 19 + 6 + 9 + 10

rank@v1 · act now

Someone is already using it

CISA KEV catalog · public proof-of-concept · FIRST EPSS

EPSS 0.98616 · CISA KEV listed  ·  without this subject the record ranks 44

What it costs you if it fires

NVD CVSS base score, then the CNA's own

CVSS 7.5, from the CNA  ·  without this subject the record ranks 65

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

rose on 2026-08-05  ·  without this subject the record ranks 78

How much of the world it touches

NVD CPE configurations

14 products in the CPE ranges  ·  without this subject the record ranks 75

Someone else already set the date

CISA KEV remediation due date

CISA remediation date held  ·  without this subject the record ranks 74

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$3.01Mover the next 30 days, if this record is yours
Movement+$479,000on 2026-08-28, the last material move, 7 days before this reading
Basisassumeda published average, not your estate

$3.01M = $4.99M incident cost x 0.6121449559255632 exposure x 0.98616 likelihood

udv@v1 · unaudited · wrong for you until you say what you run

$4.99M is the cost of a breach that happened, from IBM Cost of a Data Breach Report 2026, global average. It is not the value of any asset of yours. That average already covers breaches of every severity, so scaling it by exposure understates a partial-impact record. That is an assumption, not a measurement. Your own asset value goes in the decision record.

Hindsight · the state

0.98616EPSSKEV · LISTED
Severity7.5 HIGHreceipt
Harmunauthenticated · networkreceipt
Exploitationin the wild · KEVreceipt
Defenseno fix version held
Movementthreshold crossedreceipt
RISING10Risen from 0.00008 to 0.98616 across 21 observations. arc-rules@v1

Foresight · where to check next

No weakness class or product neighbourhood is held for this record, so this index cannot name anywhere to check next. That is an absence in the record, not a finding about the software.

Color is a claim, not decoration:the hostile worldthe defenseno signal

Running Apache Tomcat? Check your version

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Harm, if it fires from the vector and the weakness

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Reachnetwork-reachable · no privileges required · no user interaction · low attack complexityreceipt
ImpactComplete confidentiality lossreceipt
Scored fromCVSS v3.1 · the CNA's vectorreceipt
Weakness classCWE-311 Missing Encryption of Sensitive Datareceipt
Published consequencesCWE-311: Confidentiality: Read Application Data; Confidentiality, Integrity: Modify Application Data[email protected]
Ransomware campaign useUnknown to CISAreceipt

CISA KEV & Federal Remediation Deadline from the record and CISA

The fix, and how long it's been waiting.

Fixed inNo fix version in held sources, as the index stood on 4 Sep 2026.
Patch available sinceNo dated patch-availability record in held sources. The index holds reference URLs without dates and only the current revision of the CVE record, so the day a fix first existed cannot be derived. Only the versions it landed in.
CISA remediation statusoverdue since 2026-08-07receipt
CISA required actionApply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see…receipt
Show full CISA required action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Published to CISA KEV117 daysderived

Exploit Status & Known PoCs a ladder, not a score

Current rung: Exploited in the wild · CISA KEV listed, 2026-08-04.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published · 3 public repositories2026-04-15receipt
  • RUNG 3Exploited in the wild · CISA KEV listed2026-08-04receipt
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, the CNA7.5 HIGHreceipt
Exploit probability0.98616 · top 0.08% of all CVEsreceipt
Blast breadth7 products across 2 vendorsderived
Assigned byapachereceipt
Recorded changes37 · last 18 Sep 2026derived

Affected & Fixed Versions as published

Affected productApache Software Foundation Apache Tomcatreceipt
Published rangesapache tomcat 9.0.116; apache tomcat 10.1.53; apache tomcat 11.0.20; redhat jboss web server 7.0.0receipt
Show all 14 published ranges
apache tomcat 9.0.116
apache tomcat 10.1.53
apache tomcat 11.0.20
redhat jboss web server 7.0.0
redhat enterprise linux 8.0
redhat enterprise linux 9.0
redhat enterprise linux 10.0
redhat enterprise linux els 7.0
redhat enterprise linux eus 10.0
redhat enterprise linux tus 8.8
redhat enterprise linux update services for sap solutions 8.8
redhat enterprise linux update services for sap solutions 9.2
redhat enterprise linux update services for sap solutions 9.4
redhat enterprise linux update services for sap solutions 9.6

A rung lights from a row in the index, never from an assessment. "Held sources" is the true scope of the claim: this index reads the CVE record, NVD, CISA KEV, FIRST's EPSS and public proof-of-concept repositories, and it does not observe attacks.

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Attack path

Unauthenticated network requestno credentials, no interactionCISA KEV listingadded 08-04 · due 08-07Apache TomcatCWE-311 weaknessConfidentiality lossC:Hmandates remediationexploits CWE-311data compromise

What it is stated by the CNA

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. receipt

NVD's analysis a second authority

weakness
CWE-311; CWE-807
affected versions
apache tomcat 9.0.116; apache tomcat 10.1.53; apache tomcat 11.0.20; and 11 more, listed in full below
also scored by
7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

check it yourself lists.apache.org receipt

Dated events

2026-06-23EPSS moved 0.02 to 0.152026-08-04Added to CISA KEV2026-08-05EPSS moved 0.43 to 0.812026-08-07CISA remediation due2026-08-28EPSS moved 0.83 to 0.99

Movement the material steps

10 Apr 20268e-05
15 Jun 20260.01895 · scoring model v2026.06.15
23 Jun 20260.15447 · crossed 0.10
24 Jul 20260.42627
5 Aug 20260.8116 · crossed 0.50
28 Aug 20260.98616 · crossed 0.90
Show all 21 observations
10 Apr 20268e-05
11 Apr 20260.00012
15 Apr 20260.0002
21 Apr 20269e-05
11 May 20260.0001
15 May 20260.01218
22 May 20260.01646
27 May 20260.0168
3 Jun 20260.02218
5 Jun 20260.01889
7 Jun 20260.01399
15 Jun 20260.01895
23 Jun 20260.15447
30 Jun 20260.15831
10 Jul 20260.21691
24 Jul 20260.42627
5 Aug 20260.8116
6 Aug 20260.79938
7 Aug 20260.8116
11 Aug 20260.82933
28 Aug 20260.98616

21 observations held. A highlighted step crossed a promotion threshold. A step marked with a scoring model moved because the instrument was replaced, not because the vulnerability changed. receipt

The full biography

EPSS 0.98616Published2026-04-09Public PoC2026-04-15CISA KEV2026-08-04Index as of2026-09-04

Listed by CISA 117 days after it published and the record had been public for 4 months when this index was last written.

Published 2026-04-09 receipt · Public PoC 2026-04-15 receipt · CISA KEV 2026-08-04 receipt · Index as of 2026-09-04 derived

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