CVE-2023-26048 | OutOfMemoryError for large multipart without filename in Eclipse Jetty

Jetty is a java based web server and servlet engine. In affected versions servlets with multipart support (e.g. annotated with `@MultipartConfig`) that call `HttpServletRequest.getParameter()` or `HttpServletRequest.getParts()` may cause `OutOfMemoryError` when the client sends a multipart request with a part that has a name but no filename and very large content. This happens even with the default settings of `fileSizeThreshold=0` which should stream the whole part content to disk. An attacker client may send a large multipart request and cause the server to throw `OutOfMemoryError`. However, the server may be able to recover after the `OutOfMemoryError` and continue its service -- although it may take some time. This issue has been patched in versions 9.4.51, 10.0.14, and 11.0.14. Users are advised to upgrade. Users unable to upgrade may set the multipart parameter `maxRequestSize` which must be set to a non-negative value, so the whole multipart content is limited (although still read into memory).

Published: 2023-04-18 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-26048 is rated Moderate Risk (57.1/100): CVSS Medium severity, with high exploitation likelihood (EPSS 43.41%, 98th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +1.77% over the last day, indicating growing attacker interest. 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-2023-26048

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 2026-06-04 41.63% 43.41% +1.77%
2 2026-05-24 36.78% 41.63% +4.86%
3 2026-05-06 — 36.78% —

Full EPSS history (34 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-26048

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L 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:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 1.4 [email protected]
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L 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:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 1.4 [email protected]

Weakness enumeration for CVE-2023-26048

GitHub Security Advisory for CVE-2023-26048

GHSA-qw69-rqj8-6qw8 · Severity: medium · Ecosystem: maven — OutOfMemoryError for large multipart without filename in Eclipse Jetty

OS Trackers for CVE-2023-26048

vendor priority summary link
debian not yet assigned CVE-2023-26048 not yet assigned priority: Debian including 1 source packages (jetty9), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2023-26048
redhat medium — https://access.redhat.com/security/cve/CVE-2023-26048
suse medium CVE-2023-26048 severity moderate: SUSE including 58 source package names (jetty-annotations-9.4.51-1.1, jetty-annotations-9.4.51-150200.3.19.2, …), 185 product×package rows across 14 product lines (Image server-image, SUSE Linux Enterprise Module for Development Tools 15 SP4, … (14 product lines)): Fixed 185. https://www.suse.com/security/cve/CVE-2023-26048/
ubuntu medium CVE-2023-26048 medium priority: Ubuntu including 1 source packages (jetty), 13 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 10, needed 2, needs-triage 1. https://ubuntu.com/security/CVE-2023-26048

Affected software / configurations for CVE-2023-26048

Vendor Product Version Raw CPE
eclipse jetty < 9.4.51 cpe:2.3:a:eclipse:jetty:*:*:*:*:*:*:*:*
eclipse jetty >= 10.0.0, < 10.0.14 cpe:2.3:a:eclipse:jetty:*:*:*:*:*:*:*:*
eclipse jetty >= 11.0.0, < 11.0.14 cpe:2.3:a:eclipse:jetty:*:*:*:*:*:*:*:*

References for CVE-2023-26048

cvelogic Threat Intelligence