CVE-2026-78383
📛 CVE Title
Apache Tomcat: AJP DoS via missing request body
Description
Allocation of resources without limits or throttling vulnerability in Apache Tomcat allows an unauthenticated AJP request to pin an AJP processing thread leading to denial of service. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- apache
- CVSS severity
- —
- CVSS score
- —
- CVSS vector
- —
- Effective score
- 7.5 / 10 HIGH source: NVD
- CWE(s)
-
CWE-770 - Reserved
- 2026-08-24
- Published
- 2026-09-23 11:23 UTC
- Last updated
- 2026-09-23 18:10 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/78xxx/CVE-2026-78383.json
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-09-23 12:17:07 UTC
- NVD last modified
- 2026-09-23 19:19:21 UTC
- NVD CVSS v3.1
- 7.5 / 10 HIGH source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Exploitability subscore
- 3.9 / 10
- Impact subscore
- 3.6 / 10
NVD / KEV / EPSS data refreshed 2026-09-24 04:35 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-85230 - Assigner
- apache
- Published
- Sep 23, 2026, 11:23:15 AM
- Updated
- Sep 23, 2026, 6:10:45 PM
- EUVD base score (CVSS 3.1)
-
7.5 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EUVD-reported EPSS
- 0.0000
- Vendors
- Apache Software Foundation
- Products
-
Apache Tomcat (11.0.0-M1 ≤11.0.25)Apache Tomcat (8.5.0 ≤8.5.100)Apache Tomcat (9.0.0.M1 ≤9.0.121)Apache Tomcat (7.0.0 ≤7.0.109)Apache Tomcat (10.1.0-M1 ≤10.1.59)
- Aliases
-
GHSA-rpxf-vjhq-9cv9
ENISA description: Allocation of resources without limits or throttling vulnerability in Apache Tomcat allows an unauthenticated AJP request to pin an AJP processing thread leading to denial of service. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
EUVD references (1)
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat |
11.0.0-M1 (affected),
10.1.0-M1 (affected),
9.0.0.M1 (affected),
8.5.0 (affected),
7.0.0 (affected)
|
— |
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
- https://lists.apache.org/thread/tyqcqk99g7ghgk22641vf67vghcyswnw vendor-advisory
Web references (0)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
No web references attached yet.
NVD-tagged references (2)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- http://www.openwall.com/lists/oss-security/2026/09/23/25 af854a3a-2127-422b-91ae-364da2661108
- https://lists.apache.org/thread/tyqcqk99g7ghgk22641vf67vghcyswnw security@apache.org
Remediations (10)
-
web:anonhaven.com
The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
2026-09-24 11:50 UTC -
web:app.opencve.io
The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
2026-09-24 11:50 UTC -
web:cvefeed.io
The following list is the news that have been mention CVE-2026-78383 vulnerability anywhere in the article. Results are limited to the first 20 news articles due to potential performance issues. EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
2026-09-24 11:50 UTC -
web:sec.cloudapps.cisco.com
On September 16, 2026 , the Cisco Product Security Incident Response Team (PSIRT) published the advisories that are listed in the following tables. To remediate these vulnerabilities, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories. For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the ...
2026-09-24 11:50 UTC -
web:security-tracker.debian.org
Vulnerable and fixed packages The table below lists information on source packages.
2026-09-24 11:50 UTC -
web:vulmon.com
Denial of Service in Apache Tomcat via Unauthenticated AJP Resource Allocation. An unauthenticated AJP request can cause a denial of service in Apache Tomcat…
2026-09-24 11:50 UTC -
web:vulners.com
CVE-2026-78383 🗓️ 23 Sep 2026 04:23:15 Reported by apache Type cve 🔗 web.nvd.nist.gov 👁 10 Views
2026-09-24 11:50 UTC -
web:www.rapid7.com
CVE-2026-78383 : Apache Software Foundation Apache Tomcat: Allocation of resources without limits or throttling vulnerability in Apache Tomcat allows an unauthenticated AJP…. View severity, references, and remediation details from Rapid7.
2026-09-24 11:50 UTC -
web:www.tenable.com
Allocation of resources without limits or throttling vulnerability in Apache Tomcat allows an unauthenticated AJP request to pin an AJP processing thread leading to denial of service. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be ...
2026-09-24 11:50 UTC -
web:www.veeam.com
When a vulnerability is identified, our team promptly develops a patch to address and mitigate the risk. In line with our dedication to transparency, we publicly disclose the vulnerability and provide detailed mitigation information.
2026-09-24 11:50 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-78383.json.
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