How severe is CVE-2026-33407?

CVE-2026-33407 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2026-33407 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33407?

CVE-2026-33407 affects Wallosapp Wallos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33407?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-33407 have an EU (EUVD) identifier?

Yes. CVE-2026-33407 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-14948.

When was CVE-2026-33407 published?

CVE-2026-33407 was published on 2026-03-24 and last updated on 2026-06-17.

CVE-2026-33407

CVE-2026-33407 is a critical-severity vulnerability in Wallosapp Wallos with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v4: 8.3
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-14948
Weakness: CWE-918
Affected product: Wallosapp Wallos
Published: 2026-03-24
Last modified: 2026-06-17

Description

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.7.0, Wallos endpoints/logos/search.php accepts HTTP_PROXY and HTTPS_PROXY environment variables without validation, enabling SSRF via proxy hijacking. The server performs DNS resolution on user-supplied search terms, which can be controlled by attackers to trigger outbound requests to arbitrary domains. This issue has been patched in version 4.7.0.

Frequently asked questions

What is CVE-2026-33407?: Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.7.0, Wallos endpoints/logos/search.php accepts HTTP_PROXY and HTTPS_PROXY environment variables without validation, enabling SSRF via proxy hijacking. The server performs DNS resolution on user-supplied search terms, which can be controlled by attackers to trigger outbound requests to arbitrary domains. This issue has been patched in version 4.7.0.
How severe is CVE-2026-33407?: CVE-2026-33407 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2026-33407 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33407?: CVE-2026-33407 affects Wallosapp Wallos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33407?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-33407 have an EU (EUVD) identifier?: Yes. CVE-2026-33407 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-14948.
When was CVE-2026-33407 published?: CVE-2026-33407 was published on 2026-03-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wallosapp:wallos:*:*:*:*:*:*:*:*

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