Low severity · published Oct 22, 2026
CVE-2026-115507
Vikunja 2.2.0 before 2.7.1 HTML Injection via Notification Email Header
New
3.5
CVSS
0.2%
EPSS
No
On KEV
Description
Vikunja 2.2.0 before 2.7.1 contains an HTML injection vulnerability in CreateConversationalHeader in pkg/notifications/mail.go that interpolates display names and task and project titles raw into email anchors. Authenticated users can craft titles or display names that close the anchor and inject phishing links into task-comment and task-mention notification emails sent to project members.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VI
vikunja · go-vikunja
2.2.0 before 2.7.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-115507
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-115507
github.com
https://github.com/go-vikunja/vikunja
github.com
https://github.com/go-vikunja/vikunja/blob/v2.7.0/pkg/notifications/mail.go#L132-L148
github.com
https://github.com/go-vikunja/vikunja/commit/18ff05932632c65dbc90a88118597989c6af4bf9
github.com
https://github.com/go-vikunja/vikunja/releases/tag/v2.7.1
github.com
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-rp33-8f2m-hm6j
www.vulncheck.com
https://www.vulncheck.com/advisories/vikunja-2.2.0-before-2.7.1-html-injection-via-notification-email-header
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