CSV Injection Affecting shlinkio/shlink package, versions >=5.0.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-SHLINKIOSHLINK-18600669
- published9 Aug 2026
- disclosed4 Aug 2026
- creditUnknown
Introduced: 4 Aug 2026
CVE-2026-18738 (opens in a new tab)How to fix?
There is no fixed version for shlinkio/shlink.
Overview
Affected versions of this package are vulnerable to CSV Injection via the visit export process. An attacker can cause arbitrary spreadsheet formulas to be embedded in exported CSV files by supplying specially crafted values in the User-Agent, Referer, or request path headers that begin with characters such as =, +, -, or @. When an administrator opens the exported CSV file in a spreadsheet application that evaluates formulas, these payloads may be executed on the client machine.