CVE-2026-61640Network attack vector

Internal service access via unfiltered OIDC URLs

Published Aug 31, 2026 · Updated Sep 2, 2026

Server-side request forgery in Wallos before 4.9.6 allows remote authenticated users with administrator access to reach internal services. The OIDC callback passes administrator-configured token_url and user_info_url values directly to curl_init() without the SSRF validation used for other URLs. Administrator access and enabled OIDC configuration are required; requests can read cloud metadata or reach services visible only to the server.

CVSS severity8.5
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Wallos before 4.9.6 allows remote authenticated users with administrator access to reach internal services. The OIDC callback passes administrator-configured token_url and user_info_url values directly to curl_init() without the SSRF validation used for other URLs. Administrator access and enabled OIDC configuration are required; requests can read cloud metadata or reach services visible only to the server.

The record

CVE
CVE-2026-61640
Published
Aug 31, 2026
Updated
Sep 2, 2026
Vendor
ellite
Product
Wallos
Classifications
CWE-918, T1552.005
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 2, 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=< 4.9.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

ellite · Wallosversion=< 4.9.6

Published CVSS scores

8.5GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA: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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1552.005Unsecured Credentials: Cloud Instance Metadata API

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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