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TI-2026-74673 Aliases CVE-2026-102477GHSA-3f8m-f8fw-9m74

Compression bomb in Eclipse Vert.x gRPC server

Priority MEDIUM 44CWE-409Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 1 fixed, 5 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

Eclipse Vert.x versions from 4.0.0 through 4.5.34, from 5.0.0 through 5.0.12, from 5.1.0 through 5.1.9, and 5.2.0 have a gRPC server that applies its per-message size limit only to the compressed bytes received. A compressed message can expand far beyond the configured limit once decompressed, which is CWE-409, improper handling of highly compressed data. A remote attacker without privileges can send a crafted compressed gRPC message to force the endpoint to allocate more memory than configured.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00318 24th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 1 fixed, 5 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Eclipse FoundationEclipse Vert.x4.0.0 – 4.5.34; 5.0.0 – 5.0.12; 5.1.0 – 5.1.9; 5.2.0—No fix listedCNA
  • Eclipse Vert.x VendorEclipse Foundation Affected 4.0.0 – 4.5.34; 5.0.0 – 5.0.12; 5.1.0 – 5.1.9; 5.2.0 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:*4.5.0 to before 4.5.35; 5.0.0 to before 5.2.0VulnerableEclipse Foundation
cpe:2.3:a:eclipse:vert.x:5.2.0:*:*:*:*:*:*:*5.2.0VulnerableEclipse Foundation
  • cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:* Versions 4.5.0 to before 4.5.35; 5.0.0 to before 5.2.0 Vulnerable ·Eclipse Foundation
  • cpe:2.3:a:eclipse:vert.x:5.2.0:*:*:*:*:*:*:* Versions 5.2.0 Vulnerable ·Eclipse Foundation

Remediation

The sources list no fixed version for Eclipse Vert.x. Red Hat fixes Red Hat Build of Apache Camel 3.33.4.SP3 in RHSA-2026:95622, and Red Hat lists no available fix plan for Red Hat Build of Keycloak, Red Hat build of Apache Camel 4 for Quarkus 3, Red Hat build of Apicurio Registry 3 and Red Hat build of Quarkus.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Red Hat 1 advisory

  • RHSA-2026:95622 Released 2026-11-05 · Red Hat rating Important
    Red Hat Build of Apache Camel 4.18 for Quarkus 3.33 update is now available (RHBQ 3.33.4.SP3)
    • Red Hat Build of Apache Camel 3.33.4.SP3 com.google.guava.guava-33.7.2.jre-redhat-00002.jar, io.vertx.vertx-grpc-server-4.5.35.redhat-00001.jar, io.vertx.vertx-web-4.5.35.redhat-00001.jar +4

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Exploit IntelligenceAffectedNo fix yet
Red Hat Build of KeycloakAffectedNo fix yet
Red Hat build of Apache Camel 4 for Quarkus 3AffectedNo fix yet
Red Hat build of Apicurio Registry 3AffectedNo fix yet
Red Hat build of QuarkusAffectedNo fix yet
Red Hat Build of Apache Camel 3.33.4.SP3Fixed RHSA-2026:95622
Not affected: 1 product
  • Red Hat Build of Apache Camel 3.33.4.SP3

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-102477
  2. 2026-10-21 Alias added: GHSA-3f8m-f8fw-9m74
  3. 2026-10-21 Affected versions changed · Red Hat
  4. 2026-10-21 CVSS score added · Red Hat
  5. 2026-10-21 CVSS score added · NVD
  6. 2026-11-06 Fix available: Red Hat Build of Apache Camel 3.33.4.SP3 · Red Hat
  7. 2026-11-06 Fix available: RHSA-2026:95622 · Red Hat

References

Advisory 2

  • TI-2026-06017 Improper certificate validation in Eclipse Vert.x CVSS 4.0MEDIUM 6.9
  • TI-2025-10971 In Eclipse Vert.x versions [4.0.0, 4.5.21] and [5.0.0, 5.0.4], a StaticHandler… CVSS 4.0MEDIUM 6.3
  • TI-2019-13165 Path traversal in Eclipse Vert.x CVSS 3.1CRITICAL 9.8
  • TI-2018-09003 XML external entity injection in Eclipse Vert.x CVSS 3.0CRITICAL 9.8
  • TI-2018-09001 Path traversal in Eclipse Vert.x CVSS 3.0CRITICAL 9.8
  • TI-2025-10972 Cross-site scripting in Eclipse Foundation Vert.x CVSS 4.0LOW 2.3
See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences