CVE-2026-47893Network attack vector

Information exposure via exception reason headers

Published Aug 27, 2026 · Updated Aug 27, 2026

Information exposure in HandshakeWebSocketService in Spring Framework 7.0.8 and earlier allows attackers to obtain request-header data. HandshakeWebSocketService includes request headers in an exception reason instead of limiting the reason to non-sensitive handshake diagnostics. Reachability requires a Spring WebFlux application with WebSocket support and an error-producing handshake; the disclosed consequence is indirect exposure of potentially sensitive user information.

CVSS severityUnavailable
Unscored
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information exposure in HandshakeWebSocketService in Spring Framework 7.0.8 and earlier allows attackers to obtain request-header data. HandshakeWebSocketService includes request headers in an exception reason instead of limiting the reason to non-sensitive handshake diagnostics. Reachability requires a Spring WebFlux application with WebSocket support and an error-producing handshake; the disclosed consequence is indirect exposure of potentially sensitive user information.

The record

CVE
CVE-2026-47893
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Spring
Product
Spring Framework
Classifications
CWE-209
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=5.2.25.RELEASE
  2. Affected versionversion=5.3.0 <=5.3.49
  3. Affected versionversion=6.0.0 <=6.0.30
  4. Affected versionversion=6.1.0 <=6.1.28
  5. Affected versionversion=6.2.0 <=6.2.19
  6. Affected versionversion=7.0.0 <=7.0.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Spring · Spring Frameworkversion=0 <=5.2.25.RELEASE; version=5.3.0 <=5.3.49; version=6.0.0 <=6.0.30; version=6.1.0 <=6.1.28; version=6.2.0 <=6.2.19; version=7.0.0 <=7.0.8

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-209Generation of Error Message Containing Sensitive Information

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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