CVE-2024-34750 | Apache Tomcat: HTTP/2 excess header handling DoS

Improper Handling of Exceptional Conditions, Uncontrolled Resource Consumption vulnerability in Apache Tomcat. When processing an HTTP/2 stream, Tomcat did not handle some cases of excessive HTTP headers correctly. This led to a miscounting of active HTTP/2 streams which in turn led to the use of an incorrect infinite timeout which allowed connections to remain open which should have been closed. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M20, from 10.1.0-M1 through 10.1.24, from 9.0.0-M1 through 9.0.89. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 though 8.5.100. Other EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M21, 10.1.25 or 9.0.90, which fixes the issue.

Published: 2024-07-03 Last update: 2025-11-03 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-34750 is rated Moderate Risk (63.1/100): CVSS High severity, with high exploitation likelihood (EPSS 21.54%, 96th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2024-34750

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-05 21.98% 21.54% -0.44%
2 2026-05-23 21.54% 21.98% +0.44%
3 2026-04-16 — 21.54% —

Full EPSS history (58 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-34750

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2024-34750

GitHub Security Advisory for CVE-2024-34750

GHSA-wm9w-rjj3-j356 · Severity: high · Ecosystem: maven — Apache Tomcat - Denial of Service

OS Trackers for CVE-2024-34750

vendor priority summary link
debian not yet assigned CVE-2024-34750 not yet assigned priority: Debian including 2 source packages (tomcat10, tomcat9), 9 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 9. https://security-tracker.debian.org/tracker/CVE-2024-34750
redhat high — https://access.redhat.com/security/cve/CVE-2024-34750
suse high — https://www.suse.com/security/cve/CVE-2024-34750/
ubuntu medium CVE-2024-34750 medium priority: Ubuntu including 6 source packages (tomcat10, tomcat11, tomcat6, tomcat7, tomcat8, tomcat9), 56 status rows across 11 suites (bionic, focal, jammy, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 29, not-affected 11, released 8, ignored 6, needs-triage 2. https://ubuntu.com/security/CVE-2024-34750

Affected software / configurations for CVE-2024-34750

Vendor Product Version Raw CPE
apache tomcat >= 9.0.0, < 9.0.90 cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat >= 10.1.0, < 10.1.25 cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone1:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone10:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone11:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone12:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone13:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone14:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone15:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone16:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone17:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone18:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone19:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone2:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone20:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone3:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone4:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone5:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone6:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone7:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone8:*:*:*:*:*:*
apache tomcat 11.0.0 cpe:2.3:a:apache:tomcat:11.0.0:milestone9:*:*:*:*:*:*
netapp ontap_tools 9 cpe:2.3:a:netapp:ontap_tools:9:*:*:*:*:vmware_vsphere:*:*

References for CVE-2024-34750

cvelogic Threat Intelligence