CVE-2026-34486
Act now ● On CISA KEV — actively exploited
Actively exploited — on the CISA KEV list.
CVSS base
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS — probability of exploitation (30 days)
98.6%
99.9th percentile
CISA KEV
Listed
Added 2026-08-04 · patch by 2026-08-07
Weakness / dates
CWE-807
Published 2026-04-09 · modified 2026-08-10
CVSS breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
| Attack Vector | N | Network |
| Attack Complexity | L | Low |
| Privileges Required | N | None |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | N | None |
| Availability | N | None |
Timeline
- 2026-04-09 — Published (NVD)
- 2026-08-04 — Added to CISA KEV (actively exploited)
- 2026-08-07 — CISA patch-by deadline
- 2026-08-10 — Last modified (NVD)
Description
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.
Affected
References
- https://lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly
- https://www.vicarius.io/vsociety/posts/cve-2026-34486-detection-script-rce-on-apache-tomcat
- https://www.vicarius.io/vsociety/posts/cve-2026-34486-mitigation-script-rce-on-apache-tomcat
- https://access.redhat.com/errata/RHSA-2026:36787
- https://access.redhat.com/errata/RHSA-2026:36788
- https://access.redhat.com/errata/RHSA-2026:36789
- https://access.redhat.com/errata/RHSA-2026:36790
- https://access.redhat.com/errata/RHSA-2026:36876
- https://access.redhat.com/errata/RHSA-2026:36877
- https://access.redhat.com/errata/RHSA-2026:36878
- https://access.redhat.com/errata/RHSA-2026:36879
- https://access.redhat.com/errata/RHSA-2026:37136
- https://access.redhat.com/errata/RHSA-2026:37137
- https://access.redhat.com/errata/RHSA-2026:38505
- https://access.redhat.com/errata/RHSA-2026:39188
- https://access.redhat.com/errata/RHSA-2026:39189
- https://access.redhat.com/security/cve/CVE-2026-34486
- https://bugzilla.redhat.com/show_bug.cgi?id=2457027
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34486.json
- https://socradar.io/blog/snowlight-government-chinese-campaign/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34486