CVE-2026-29146
No exploitation reported by the sources we read.
- Published2026-04-09
- Fixed in11.0.20 · 10.1.53 · 9.0.116
- WeaknessCWE-1240 · CWE-209 · CWE-642
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Padding Oracle vulnerability in Apache Tomcat's EncryptInterceptor with default configuration. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.0.0-M1 through 10.1.52, from 9.0.13 through 9..115, from 8.5.38 through 8.5.100, from 7.0.100 through 7.0.109. Users are recommended to upgrade to version 11.0.19, 10.1.53 and 9.0.116, which fixes the issue.
Timeline
dates in UTC- 2026-04-0920:16CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-29146?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-29146?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 11.0 | ≥ 11.0.0, < 11.0.20 | 11.0.20 | NVD |
| 10.x | ≥ 10.0.0, < 10.1.53 | 10.1.53 | NVD |
| 9.0 | ≥ 9.0.13, < 9.0.116 | 9.0.116 | NVD |
| 7.0 | ≥ 7.0.100, ≤ 7.0.109 | no fix published | NVD |
| 8.5 | ≥ 8.5.38, ≤ 8.5.100 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
Red Hat Security Advisory: Red Hat JBoss Web Server 7.0.0 security release
Red Hat Security Advisory: Red Hat JBoss Web Server 7.0.0 security release
Fix
- Update Apache Tomcat to 11.0.20 · 10.1.53 · 9.0.116
- Vendor fix Red Hat Product Security RHSA-2026:39188 · 33 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
- Vendor fix Red Hat Product Security RHSA-2026:39189 · 1 productBefore applying the update, back up your existing Red Hat JBoss Web Server installation, including all applications and configuration files. The References section of this erratum contains a download link for the update. You must be logged in to download the update.
- Workaround from the vendor Red Hat Product Security RHSA-2026:39188 · 90 productsThis vulnerability can be mitigated by removing the affected jar file from the tomcat installation. It can be achieved by running the following command as root: ~~~ systemctl stop tomcat rm -fv /usr/share/java/tomcat/catalina-tribes.jar systemctl start tomcat ~~~ It's important to notice if the T…
Advisories and patches
- lists.apache.orgVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Published
- 2026-04-09
- Last Modified
- 2026-08-04
- NVD status
- Modified
Frequently asked questions
What is CVE-2026-29146?
Is CVE-2026-29146 actively exploited?
What is the CVSS score for CVE-2026-29146?
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