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NVD / CVE Program· CNA apache

CVE-2026-34486: Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor

Noroxi assessment

Priority: Now (action score 90/100)

  • CISA has confirmed exploitation in the wild (Aug 4, 2026). Remediation deadline for US federal agencies: Aug 7, 2026.
  • A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
  • Probability of exploitation in the next 30 days: 98.5% (FIRST EPSS); higher than 99.9% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: Apache Software Foundation Apache Tomcat 11.0.21.

Patch today or shut off access. Upgrade to Apache Software Foundation Apache Tomcat 11.0.21 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

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.

HighCVSS 7.5 · v3.1KEVWeaponized Fix available
Published
Apr 9, 2026
Updated
Oct 26, 2026
EPSS
98.5% · 99th percentile

Report tools

JSON

Action score

90

Now

Patch today or shut off access.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
30 / 30 · Listed
EPSS
30 / 30 · 98.5%

CISA SSVC decision

Exploitation
active
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Aug 4, 2026. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Aug 7, 2026.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
apachetomcat
redhatjboss web server
redhatenterprise linux
redhatenterprise linux els
redhatenterprise linux eus
redhatenterprise linux tus
redhatenterprise linux update services for sap solutions

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • apache tomcat10.1.53
  • apache tomcat11.0.20
  • apache tomcat9.0.116
  • redhat enterprise linux10.0
  • redhat enterprise linux8.0
  • redhat enterprise linux9.0
  • redhat enterprise linux els7.0
  • redhat enterprise linux eus10.0
  • redhat enterprise linux tus8.8
  • redhat enterprise linux update services for sap solutions8.8
  • redhat enterprise linux update services for sap solutions9.2
  • redhat enterprise linux update services for sap solutions9.4
  • redhat enterprise linux update services for sap solutions9.6
  • redhat jboss web server7.0.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (apache). Independent of NVD's CPE analysis and usually ahead of it.

  • Apache Software Foundation Apache Tomcat

    • 11.0.20, 10.1.53, 9.0.116affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10tomcatbefore 1:10.1.49-3.el10_2.alma.11:10.1.49-3.el10_2.alma.1
AlmaLinux:10tomcat-admin-webappsbefore 1:10.1.49-3.el10_2.alma.11:10.1.49-3.el10_2.alma.1
AlmaLinux:10tomcat-docs-webappbefore 1:10.1.49-3.el10_2.alma.11:10.1.49-3.el10_2.alma.1
AlmaLinux:10tomcat-el-5.0-apibefore 1:10.1.49-3.el10_2.alma.11:10.1.49-3.el10_2.alma.1
AlmaLinux:10tomcat-jsp-3.1-apibefore 1:10.1.49-3.el10_2.alma.11:10.1.49-3.el10_2.alma.1
AlmaLinux:10tomcat-libbefore 1:10.1.49-3.el10_2.alma.11:10.1.49-3.el10_2.alma.1
AlmaLinux:10tomcat-servlet-6.0-apibefore 1:10.1.49-3.el10_2.alma.11:10.1.49-3.el10_2.alma.1
AlmaLinux:10tomcat-webappsbefore 1:10.1.49-3.el10_2.alma.11:10.1.49-3.el10_2.alma.1
AlmaLinux:10tomcat9before 1:9.0.117-2.el10_2.alma.11:9.0.117-2.el10_2.alma.1
AlmaLinux:10tomcat9-admin-webappsbefore 1:9.0.117-2.el10_2.alma.11:9.0.117-2.el10_2.alma.1
AlmaLinux:10tomcat9-docs-webappbefore 1:9.0.117-2.el10_2.alma.11:9.0.117-2.el10_2.alma.1
AlmaLinux:10tomcat9-el-3.0-apibefore 1:9.0.117-2.el10_2.alma.11:9.0.117-2.el10_2.alma.1
AlmaLinux:10tomcat9-jsp-2.3-apibefore 1:9.0.117-2.el10_2.alma.11:9.0.117-2.el10_2.alma.1
AlmaLinux:10tomcat9-libbefore 1:9.0.117-2.el10_2.alma.11:9.0.117-2.el10_2.alma.1
AlmaLinux:10tomcat9-servlet-4.0-apibefore 1:9.0.117-2.el10_2.alma.11:9.0.117-2.el10_2.alma.1
AlmaLinux:10tomcat9-webappsbefore 1:9.0.117-2.el10_2.alma.11:9.0.117-2.el10_2.alma.1
AlmaLinux:8tomcatbefore 1:9.0.87-2.el8_101:9.0.87-2.el8_10
AlmaLinux:8tomcat-admin-webappsbefore 1:9.0.87-2.el8_101:9.0.87-2.el8_10
AlmaLinux:8tomcat-docs-webappbefore 1:9.0.87-2.el8_101:9.0.87-2.el8_10
AlmaLinux:8tomcat-el-3.0-apibefore 1:9.0.87-2.el8_101:9.0.87-2.el8_10
AlmaLinux:8tomcat-jsp-2.3-apibefore 1:9.0.87-2.el8_101:9.0.87-2.el8_10
AlmaLinux:8tomcat-libbefore 1:9.0.87-2.el8_101:9.0.87-2.el8_10
AlmaLinux:8tomcat-servlet-4.0-apibefore 1:9.0.87-2.el8_101:9.0.87-2.el8_10
AlmaLinux:8tomcat-webappsbefore 1:9.0.87-2.el8_101:9.0.87-2.el8_10

+96

Same product

apache: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-24813Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUTKEV
    99Now
  • CVE-2016-8735Remote code execution is possible with Apache Tomcat before 6.0.48, 7.x before 7.0.73, 8.x before 8.0.39, 8.5.x before 8.5.7, and 9.x beforeKEV
    96Now
  • CVE-2017-12617When running Apache Tomcat versions 9.0.0.M1 to 9.0.0, 8.5.0 to 8.5.22, 8.0.0.RC1 to 8.0.46 and 7.0.0 to 7.0.81 with HTTP PUTs enabled (e.g.KEV
    92Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-32990Apr 9, 2026 · Apache Tomcat: Fix for CVE-2025-66614 is incomplete
    21Monitor
  • ← EarlierCVE-2026-34483Apr 9, 2026 · Apache Tomcat: Incomplete escaping of JSON access logs
    30Monitor
  • Later →CVE-2026-34487Apr 9, 2026 · Apache Tomcat: Cloud membership for clustering component exposed the Kubernetes bearer token
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Apache Software Foundation Apache Tomcat11.0.21 · descriptionVendor (CNA)
almalinux:tomcat1:10.1.49-3.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:tomcat-admin-webapps1:10.1.49-3.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:tomcat-docs-webapp1:10.1.49-3.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:tomcat-el-5.0-api1:10.1.49-3.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:tomcat-jsp-3.1-api1:10.1.49-3.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:tomcat-lib1:10.1.49-3.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:tomcat-servlet-6.0-api1:10.1.49-3.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:tomcat-webapps1:10.1.49-3.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:tomcat91:9.0.117-2.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:tomcat9-admin-webapps1:9.0.117-2.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:tomcat9-docs-webapp1:9.0.117-2.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:tomcat9-el-3.0-api1:9.0.117-2.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
Maven:org.apache.tomcat:tomcat10.1.54Package registry (OSV)
Maven:org.apache.tomcat:tomcat11.0.21Package registry (OSV)
Maven:org.apache.tomcat:tomcat9.0.117Package registry (OSV)
Maven:org.apache.tomcat:tomcat-tribes10.1.54Package registry (OSV)
Maven:org.apache.tomcat:tomcat-tribes11.0.21Package registry (OSV)
Maven:org.apache.tomcat:tomcat-tribes9.0.117Package registry (OSV)
opensuse:tomcat9.0.117-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:tomcat1010.1.54-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:tomcat1111.0.21-1.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:tomcat1:10.1.36-2.el10_0 · Red Hat:enterprise_linux_eus:10.0Package registry (OSV)
red hat:tomcat-admin-webapps1:10.1.36-2.el10_0 · Red Hat:enterprise_linux_eus:10.0Package registry (OSV)
red hat:tomcat-docs-webapp1:10.1.36-2.el10_0 · Red Hat:enterprise_linux_eus:10.0Package registry (OSV)
red hat:tomcat-el-5.0-api1:10.1.36-2.el10_0 · Red Hat:enterprise_linux_eus:10.0Package registry (OSV)
red hat:tomcat-jsp-3.1-api1:10.1.36-2.el10_0 · Red Hat:enterprise_linux_eus:10.0Package registry (OSV)
red hat:tomcat-lib1:10.1.36-2.el10_0 · Red Hat:enterprise_linux_eus:10.0Package registry (OSV)
red hat:tomcat-servlet-6.0-api1:10.1.36-2.el10_0 · Red Hat:enterprise_linux_eus:10.0Package registry (OSV)
red hat:tomcat-webapps1:10.1.36-2.el10_0 · Red Hat:enterprise_linux_eus:10.0Package registry (OSV)

+9

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Nuclei detection template ×1
  • Proof-of-concept repository on GitHub ×5

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Nuclei detection templateNuclei template CVE-2026-34486 —
Proof-of-concept repository on GitHubstars:122026-04-15
Proof-of-concept repository on GitHubstars:102026-04-15
Proof-of-concept repository on GitHubstars:702026-05-11
Proof-of-concept repository on GitHubstars:02026-07-23
Proof-of-concept repository on GitHubstars:02026-08-19

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+5 d
  3. CISA KEV+116 d
  4. TodayNov 10, 2026+215 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-311 · Missing Encryption of Sensitive Data

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (19 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records