Skip to content
vulnerability

CVE-2026-34486

7.5
High
KEV · Exploited in wildEPSS 99%Patch available

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.

exploited
Yes, in CISA KEV since 4 Aug 2026fix by 7 Aug 2026 (CISA deadline for US federal agencies)unvetted proof-of-concept code on github
fix
Fixed in 9.0.117, 10.1.54, 11.0.21
likelihood
EPSS 98.5%
Published 9 Apr 2026Analysed here 2 Nov 2026CVSS scored by CISA

do firstUpgrade to a fixed release: 9.0.117, 10.1.54, 11.0.21.

triage
surface unknownruntimeWAF can block: partlyAV · networkCWE-311· Common WeaknessCWE-807· Common Weakness

Can a WAF block it? Partly. The bug can be reached over the network, so generic WAF rules may stop some attacks. Its weakness type is unknown, so we cannot be more precise.

Also consider: patch

Based on the weakness type only; no CVE-specific evidence yet. We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.

cvss vector
attack vectornetworkattack complexitylowprivileges requirednoneuser interactionnonescopeunchangedconfidentialityhighintegritynoneavailabilitynone
CVSS 3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
common questions

Is CVE-2026-34486 being exploited?

Yes. CVE-2026-34486 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.

How severe is CVE-2026-34486?

CVE-2026-34486 is rated High with a CVSS score of 7.5. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.

Is there a patch for CVE-2026-34486?

Yes. A fix has been recorded for CVE-2026-34486. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.

What does CVE-2026-34486 affect?

CVE-2026-34486 affects apache:tomcat, redhat:jboss_web_server, redhat:enterprise_linux, redhat:enterprise_linux_els, and 3 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.

executive summary
technical analysis
affected
apache:tomcatredhat:jboss_web_serverredhat:enterprise_linuxredhat:enterprise_linux_elsredhat:enterprise_linux_eusredhat:enterprise_linux_tusredhat:enterprise_linux_update_services_for_sap_solutions
affected versions
Apache Tomcatfrom the Bitnami advisory, via OSV
  • affected>= 9.0.116 and < 9.0.117
  • affected>= 10.1.53 and < 10.1.54
  • affected>= 11.0.20 and < 11.0.21
vendor says fixed in9.0.117, 10.1.54, 11.0.21
Apache Software Foundation Apache Tomcat
  • affected11.0.20
  • affected10.1.53
  • affected9.0.116

As published in the CVE Program record, and, for products that ship the affected component, in the advisory named beside them. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.

public exploits

Unvetted proof-of-concept code on GitHub: 5 GitHub proofs of concept · 1 Nuclei template

Listed so you can judge urgency, not as a recommendation to run anything. GitHub “proofs of concept” are unvetted: some are fake or carry malware. Exploit-DB marks the entries its staff verified.

cisa ssvc

exploitation
active
automatable
yes
technical impact
partial

Assessed by CISA 7 Aug 2026 (SSVC 2.0.3).

timeline

  1. 9 Apr 2026Published
  2. 15 Apr 2026First proof-of-concept repository on GitHub (unvetted) · 5 days later
  3. 4 Aug 2026Added to CISA KEV (exploited in the wild) · 111 days (about 4 months) later
  4. 7 Aug 2026CISA remediation due date (US federal agencies) · 3 days later
  5. 7 Aug 2026CISA SSVC assessment: exploitation active · same day later
  6. 21 Sept 2026CVE record last updated · 46 days later
  7. 2 Nov 2026Analysed by vulneraibility.com · 42 days later

also known as

GHSA-69r9-qgr7-g2wj
how to fix
Remediation steps are tailored for users whose stack is affected. Add this technology to your stack to see the fix checklist.
references
NVDCVE.orgCVE DetailsSource
21 references in the CVE record: 15 advisories, 6 links
Show 13 more

sources

  • CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
  • NVD: CVSS and CPE data
  • CISA KEV catalog: exploitation, date added, due date
  • CISA Vulnrichment (ADP): SSVC decision points
  • FIRST EPSS: exploit probability and percentile
  • Nuclei templates: detection templates
  • PoC-in-GitHub: GitHub repositories that claim a proof of concept
  • OSV: advisory aliases and downstream package versions
  • Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.
get alerted

Track only the vulnerabilities that affect your infrastructure.

start for free

© 2026 vulneraibility.com, all rights reserved