CVE-2026-108579

MEDIUM 4.2

OpenPanel through 2.3.0 CSV Formula Injection via Cohort Member Export

CVSS Score

4.2

EPSS Score

0.0%

EPSS Percentile

0th

OpenPanel through 2.3.0 contains a CSV formula injection vulnerability that allows unauthenticated attackers to embed spreadsheet formulas by supplying crafted profile IDs to the /track endpoint. Attackers can send tracking events with profile IDs like =HYPERLINK(...) matching a cohort, so exported cohort CSVs execute formulas that exfiltrate adjacent cell data.

CWE	CWE-1236
Vendor	openpanel-dev
Product	openpanel
Published	Oct 10, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

Openpanel-dev / openpanel

0 ≤ 2.3.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

hackmd.io: https://hackmd.io/@haind/openpanel-cohort-csv-formula-injection github.com: https://github.com/Openpanel-dev/openpanel/blob/7c4d22ae4b6b20fb08eb5c94a0cd3cfebb3d32ca/apps/start/src/utils/csv-download.ts#L1-L29 github.com: https://github.com/Openpanel-dev/openpanel vulncheck.com: https://www.vulncheck.com/advisories/openpanel-through-2.3.0-csv-formula-injection-via-cohort-member-export

Credits

HaiND from the Post and Telecommunication Institute of Technology