CVE-2020-27218

unknown

Published 2020-12-02 · Modified 2026-03-13

CVSS v3

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CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

CVSS v2

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VIR risk

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Description

In Eclipse Jetty version 9.4.0.RC0 to 9.4.34.v20201102, 10.0.0.alpha0 to 10.0.0.beta2, and 11.0.0.alpha0 to 11.0.0.beta2, if GZIP request body inflation is enabled and requests from different clients are multiplexed onto a single connection, and if an attacker can send a request with a body that is received entirely but not consumed by the application, then a subsequent request on the same connection will see that body prepended to its body. The attacker will not see any data but may inject data into the body of the subsequent request.

Predictions

Exploit likelihood

30%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-27218

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2020-27218.html

OS impact

OS	Version	Status	Fixed in
sles		affected
debian	bookworm	fixed	`9.4.35-1`
debian	bullseye	fixed	`9.4.35-1`
debian	forky	fixed	`9.4.35-1`
debian	sid	fixed	`9.4.35-1`
debian	trixie	fixed	`9.4.35-1`

Package impact

Ecosystem	Package	Vulnerable	Fixed
Maven	org.eclipse.jetty:jetty-server	`>=9.4.0,<9.4.35.v20201120`	`9.4.35.v20201120`

References

Verify integrity in audit chain (admin only). AS-IS.