CVE-2026-102477GHSA-4wvq-75mw-q6cg
In Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], a gRPC endpoint does have a configurable per message maximum size in bytes, however the maximum size ap
Eclipse Foundation Eclipse Vert.x
CVSS
8.7HighExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.32%Chance of exploitation activity in the next 30 days, higher than 23% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
What fixes it
No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.
Description
In Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], a gRPC endpoint does have a configurable per message maximum size in bytes, however the maximum size applies to the received bytes. When applied to a compressed message, this only applies to the compressed size and not the actual size of the uncompressed content. This can be used to force a gRPC endpoint to allocate more bytes than the value defined by the configuration, making the endpoint vulnerable to compression bomb attacks.
The impacted component is io.vertx:vertx-gprc-server.
Text from CVE List
Affected versions 4
- Eclipse Vert.xaffected: 4.0.0 through 4.5.34CVE List
- Eclipse Vert.xaffected: 5.0.0 through 5.0.12CVE List
- Eclipse Vert.xaffected: 5.1.0 through 5.1.9CVE List
- Eclipse Vert.xaffected: 5.2.0CVE List