CVE-2026-47879Network attack vector

Authenticated SSRF and file reads via proto descriptors

Published Aug 27, 2026 · Updated Aug 27, 2026

SSRF and local file access in affected Spring Cloud Gateway releases allow remote authenticated users to read remote or host resources. The JsonToGrpcGatewayFilterFactory accepts an unrestricted Spring Resource location for its proto descriptor and dereferences attacker-selected URL or file schemes. Exploitation requires high privileges to control a JsonToGrpc route; affected ranges are 3.1.13 and earlier, 4.0.0 through 4.2.9, 4.3.0 through 4.3.5, and 5.0.0 through 5.0.2.

CVSS severity7.7
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF and local file access in affected Spring Cloud Gateway releases allow remote authenticated users to read remote or host resources. The JsonToGrpcGatewayFilterFactory accepts an unrestricted Spring Resource location for its proto descriptor and dereferences attacker-selected URL or file schemes. Exploitation requires high privileges to control a JsonToGrpc route; affected ranges are 3.1.13 and earlier, 4.0.0 through 4.2.9, 4.3.0 through 4.3.5, and 5.0.0 through 5.0.2.

The record

CVE
CVE-2026-47879
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Spring
Product
Spring Cloud Gateway
Classifications
T1190
Attack vector
network
Privileges
admin

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 <=3.1.13
  2. Affected versionversion=4.0.0 <=4.2.9
  3. Affected versionversion=4.3.0 <=4.3.5
  4. Affected versionversion=5.0.0 <=5.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Spring · Spring Cloud Gatewayversion=0 <=3.1.13; version=4.0.0 <=4.2.9; version=4.3.0 <=4.3.5; version=5.0.0 <=5.0.2

Published CVSS scores

7.7SpringCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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