CVE-2026-108579: OpenPanel through 2.3.0 CSV Formula Injection via Cohort Member Export

Severity: medium (CVSS 4.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-10 · updated 2026-10-14
Weakness: CWE-1236

Description

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.

Affected products

Openpanel-dev openpanel: through 2.3.0

References

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

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