CVE-2026-1605

CVE-2026-1605 is a high-severity vulnerability in Eclipse Jetty with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Description

In Eclipse Jetty, versions 12.0.0-12.0.31 and 12.1.0-12.0.5, class GzipHandler exposes a vulnerability when a compressed HTTP request, with Content-Encoding: gzip, is processed and the corresponding response is not compressed. This happens because the JDK Inflater is allocated for decompressing the request, but it is not released because the release mechanism is tied to the compressed response. In this case, since the response is not compressed, the release mechanism does not trigger, causing the leak.

Frequently asked questions

What is CVE-2026-1605?
In Eclipse Jetty, versions 12.0.0-12.0.31 and 12.1.0-12.0.5, class GzipHandler exposes a vulnerability when a compressed HTTP request, with Content-Encoding: gzip, is processed and the corresponding response is not compressed. This happens because the JDK Inflater is allocated for decompressing the request, but it is not released because the release mechanism is tied to the compressed response. In this case, since the response is not compressed, the release mechanism does not trigger, causing the leak.
How severe is CVE-2026-1605?
CVE-2026-1605 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-1605 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-1605?
CVE-2026-1605 affects Eclipse Jetty. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-1605?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-1605 have an EU (EUVD) identifier?
Yes. CVE-2026-1605 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9815.
When was CVE-2026-1605 published?
CVE-2026-1605 was published on 2026-03-05 and last updated on 2026-06-30.

References

Affected products (1)

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Threat intelligence

Threat-intel indicators referencing this CVE: