CVE-2026-73095: high-severity vulnerability in Apache Juneau
Apache Juneau: Denial of service via unbounded memory allocation in parsers and REST request handling
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.4%
Allocation of Resources Without Limits or Throttling vulnerability in Apache Juneau.
The MessagePack parser, which the REST server enables by default, sizes buffers from length values in the input. An unauthenticated client can send a few bytes that force a multi-gigabyte allocation and an OutOfMemoryError, causing denial of service. Related unbounded allocations in REST request handling (multipart uploads and request reader buffers) are fixed at the same time.
This issue affects Apache Juneau: through 9.2.0.
Users are recommended to upgrade to version 9.2.1, which fixes the issue.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
Apache Software Foundation · Apache JuneauRelated CVEs — Apache Juneau
In the same product, most dangerous first.
CVE-2026-121489CRITICALApache Juneau: Path traversal in DirectoryResource allows reading files outside the configured root directoryEPSS 0.5%CVE-2026-73098CRITICALApache Juneau: Unsafe reflection allows attacker-controlled class initialization during parsingEPSS 0.5%CVE-2026-96677CRITICALApache Juneau: Cross-site scripting via unescaped request variables in HTML-doc chromeEPSS 0.4%CVE-2026-73117CRITICALApache Juneau: Response header CRLF injection and open redirect when applications set headers or redirect targets from request dataEPSS 0.4%CVE-2026-73101CRITICALApache Juneau: Internal exception class and message disclosed via error response header and body regardless of secure defaultsEPSS 0.4%CVE-2026-73100CRITICALApache Juneau: Sensitive request headers logged in cleartext by the default request logger on server errorsEPSS 0.4%