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CVE-2026-26747

Published: Feb 20, 2026Updated: Feb 26, 2026 Sources: CVE List NVDCWE-644
9.1CRITICAL
NVD MITRE
EPSS Score
0.4%
Top 67.6%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available
Self-Check
Not available

Description

A Host Header Poisoning vulnerability exists in Monica 4.1.2 due to improper handling of the HTTP Host header in app/Providers/AppServiceProvider.php, combined with the default misconfiguration where the "app.force_url" is not set and default is "false". The application generates absolute URLs (such as those used in password reset emails) using the user-supplied Host header. This allows remote attackers to poison the password reset link sent to a victim,

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-644

Affected Products

monicahq
oss-projectaka monica
monicaSaaS
Enterprise Software / crm
and 1 more affected products View all →

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
Is your org exposed to CVE-2026-26747?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://github.com/hungnqdz/cve-research/blob/main/CVE-2026-26747.md
github.com
https://github.com/monicahq/monica
github.com

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