CVE Watch3 sept 2026

CVE-2026-77353

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 5.0.0, Wallos allows authenticated users to inject a

CVSS

4.6

Medio

EPSS

0.2%

KEV

—

Exploit Today

0-100

Publicado: 31 ago 2026 · Última mod.: 3 sept 2026 · CWE-74 · CWE-116

EPSS · 30d

0.2%EPSS · 30 días0.2%

2026-09-012026-09-06

Descripción técnica

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 5.0.0, Wallos allows authenticated users to inject arbitrary iCalendar properties and events into their exported .ics feed by embedding raw CRLF sequences in subscription names or notes. Because the input validation layer only encodes HTML metacharacters but never strips newlines, and the export layer decodes those entities back before writing iCal output, an attacker with any valid account can craft a subscription whose name breaks out of the current VEVENT block and inserts fully attacker-controlled calendar events — including spoofed organizers, arbitrary email addresses in ATTENDEE properties, and misleading event content — into any calendar application subscribed to that feed. This issue has been patched in version 5.0.0.

Referencias oficiales

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