Is CVE-2026-35601 in the CISA KEV catalog?

No. CVE-2026-35601 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-35601?

CVE-2026-35601 has a CVSS v3 base score of 4.1 (MEDIUM).

What is the EPSS score for CVE-2026-35601?

CVE-2026-35601 has an EPSS score of 0.20% (9th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-35601?

Upgrade vikunja to 2.3.0 or later.

CVE & CISA-KEV Catalog

CVE-2026-35601

MEDIUM

4.1

CVSS v3

NVD

Description

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the CalDAV output generator builds iCalendar VTODO entries via raw string concatenation without applying RFC 5545 TEXT value escaping. User-controlled task titles containing CRLF characters break the iCalendar property boundary, allowing injection of arbitrary iCalendar properties such as ATTACH, VALARM, or ORGANIZER. This vulnerability is fixed in 2.3.0.

CWE-93

How to fix

Remediation Available

vikunjaNVD

Affected:< 2.3.0Fixed in:2.3.0CVE-2026-35601derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionRequired

ScopeChanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N

Exploit Intelligence

0.20%probability of exploitation in 30 days

9thpercentile

Low risk: more likely to be exploited than 9% of all known CVEs.

References

Exploit1

github.com

Issue Tracking1

github.com

Release Notes1

github.com

Related Vulnerabilities

Other CWE-93 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-61884	High	7.5	98%	KEV + Ransom	-
CVE-2022-0666	High	7.5	44%	-	Fix
CVE-2016-3115	Medium	6.4	37%	-	Fix
CVE-2024-20337	High	8.2	30%	-	Fix
CVE-2021-39172	High	8.8	29%	-	Fix
CVE-2016-4975	Medium	6.1	20%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-17.