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CVE-2026-102479high8.7

In Eclipse Vert.x versions [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the Vert.x HTTP/1.x decoder uses a canonicalization for well known HTTP…

Impact

Eclipse Vert.x versions 5.0.0 to 5.0.12, 5.1.0 to 5.1.9, and 5.2.0 have a weakness where the HTTP/1.x decoder's canonicalization process can interpret crafted headers, potentially allowing request smuggling. The impacted component is io.vertx:vertx-core. This can be exploited for request smuggling purposes.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

Eclipse Foundation · eclipse

Eclipse Vert.x

3 ranges
eclipse version evidence

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affected

5.0.0 → through 5.0.12

semver versions

5.1.0 → through 5.1.9

semver versions

5.2.0

semver versions

unaffected

unknown

Other versions: unaffected

Original source description

In Eclipse Vert.x versions [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the Vert.x HTTP/1.x decoder uses a canonicalization for well known HTTP headers, the canonicalization process interprets well crafted headers as headers of this list, allowing for instance Content-Xength to be interpeted as Content-Length.

This can be exploited for request smuggling purpose.

The impacted component is io.vertx:vertx-core.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-102479

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Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-444 ↗

CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

CISA-ADP

Related →
Contributing organizations · 3
eclipse

Assigning organization

2026-10-14
CISA-ADP

Additional data publisher

2026-10-16
CVE

Additional data publisher

2026-10-28

What changed

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References

3 sources
github.com/eclipse-vertx/vert.x/security/advisories/GHSA-ch7p-g5pm-3gqx
Security advisoryeclipse
gitlab.eclipse.org/security/cve-assignment/-/work_items/352
Security advisoryeclipse
www.openwall.com/lists/oss-security/2026/10/28/19
Security advisoryCVE