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🛡️ CVE-2026-10051 — jetty

🟠 CVSS 7.5 — High ⚠️ Exploit Public CWE-200 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Eclipse Jetty: Cross-Request Leakage for trailers on HTTP/1.1 keep-alive connections

Description

> FINDING — MEDIUM (HTTP/1.1 keep-alive connections with trailers)

> HttpConnection._trailers Cross-Request Leakage (Never Reset Between Requests)

>

> Location:

> jetty-core/jetty-server/src/main/java/org/eclipse/jetty/server/internal/

> HttpConnection.java:107, 1157-1161, 1170

>

> Detail:

> _trailers (line 107) is a connection-scoped HttpFields.Mutable field.

> parsedTrailer() (line 1157) populates it when request N carries HTTP trailers.

> messageComplete() (line 1170) checks "if (_trailers != null)" — evaluates true

> from request N's data — and stamps it onto request N+1.

>

> Grep confirms: ZERO occurrences of "_trailers = null" in entire HttpConnection.java.

>

> Scenario:

> Request N: POST /upload (trailers: X-Checksum: abc123)

> Request N+1: GET /data (no trailers)

> app: request.getTrailers() on N+1 → returns {X-Checksum: abc123} ← STALE

>

> Application logic branching on getTrailers() != null produces incorrect behavior.

> Not cross-connection (same keep-alive connection only).

>

> More dangerous scenario: TOCTOU — trailer passes check, target swapped before use.

Workarounds

Do not rely on HTTP request trailers for security-sensitive logic, or disable persistent connections by closing the connection after each HTTP/1.1 request.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: None.
  • Availability impact: None.

Weakness class

CVE-2026-10051 is classified as CWE-200: Exposure of Sensitive Information. Information that should stay internal is disclosed to someone who is not authorised to see it.

Affected software

CVE-2026-10051 is recorded against 2 packages.

  • jetty (from 12.1.0 up to 12.1.10)
  • org.eclipse.jetty:jetty-server (from 12.1.0 up to 12.1.10)

Timeline and source

Published on 14 July 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

gitlab.eclipse.org

Other advisories for this package

jetty has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-200: Exposure of Sensitive Information) in other software:

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE CWE-200
Public Exploit ⚠️ Yes
Source NVD
Published 2026-07-14
Updated 2026-08-20
Modified 2026-07-14
Fix URL N/A

Affected Packages

Software From version Fixed in
jetty 12.1.0 12.1.10
org.eclipse.jetty:jetty-server 12.1.0 12.1.10

Similar Threats

Exploit Protection

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