CVE-2026-100563: OpenClaw before 2026.8.1 CSV Formula Injection via Session Labels

Severity: medium (CVSS 5.4 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: 2026-09-26 · updated 2026-10-05
Weakness: CWE-1236

Description

OpenClaw (npm package `openclaw`) before 2026.8.1 does not neutralize leading characters that spreadsheet applications interpret as formulas when the Control UI exports session data to CSV. Although session labels were quoted as CSV text, a lower-trust participant who can influence a session label or the first user message can place a formula-like cell in the Usage export; if an operator opens that export in a spreadsheet application with formula evaluation enabled, the cell may be evaluated with the permissions of the spreadsheet user. OpenClaw itself does not evaluate the formula, and practical impact depends on the spreadsheet application's security settings. The issue is fixed in 2026.8.1.

Affected products

OpenClaw: before 2026.8.1 — fixed in 2026.8.1

How to fix

Upgrade to a fixed version: OpenClaw 2026.8.1. Check the vendor advisory for mitigations.

References

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