CVE-2026-33399Public exploitNetwork attack vector

Authenticated internal requests via unvalidated notification URLs

Published Mar 24, 2026 · Updated Mar 24, 2026

SSRF in Wallos before 4.7.0 allows remote authenticated users to send server-side requests to internal or private network URLs. The notification save endpoints persist user-supplied webhook URLs after checking only their scheme and syntax, without calling validate_webhook_url_for_ssrf(). When sendnotifications.php later processes a saved URL, the server performs a blind request that can reach internal services or cloud metadata endpoints.

CVSS severity7.7
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Wallos before 4.7.0 allows remote authenticated users to send server-side requests to internal or private network URLs. The notification save endpoints persist user-supplied webhook URLs after checking only their scheme and syntax, without calling validate_webhook_url_for_ssrf(). When sendnotifications.php later processes a saved URL, the server performs a blind request that can reach internal services or cloud metadata endpoints.

The record

CVE
CVE-2026-33399
Published
Mar 24, 2026
Updated
Mar 24, 2026
Vendor
ellite
Product
Wallos
Classifications
CWE-918, CAPEC-664
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 24, 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=< 4.7.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ellite · Wallosversion=< 4.7.0

Published CVSS scores

7.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery

Public exploit references

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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