What’s Vulnerable › Vulnerabilities

CVE-2026-59966: Tandoor Recipes: ReDoS (Regular Expression Denial of Service) via User-Controlled Automation Regex Patterns

• Severity: medium (CVSS 5.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-16 · updated 2026-10-19
• Weakness: CWE-1333

Description

Tandoor Recipes is an application for managing recipes, planning meals, and building shopping lists. Prior to 2.6.10, executes user-controlled Automation regular-expression patterns with Python re.sub() without complexity validation or an execution timeout when an authenticated user stores a catastrophic-backtracking regex and any user in the same Space imports a matching recipe. Request processing uses Automation.param_2, apply_regex_replace_automation, sub, api/recipe-from-source/. The attack works because the shared-Space automation engine evaluates the malicious pattern during recipe import and can occupy a Gunicorn worker until its request timeout. This can exhaust application worker slots and make the service unavailable to users. This issue is fixed in version 2.6.10.

Affected products

• TandoorRecipes recipes: before 2.6.10

References

• https://github.com/TandoorRecipes/recipes/commit/adc2732712819d7fe26a9f74f6b0271c1a9d87c3
• https://github.com/TandoorRecipes/recipes/releases/tag/2.6.10
• https://github.com/TandoorRecipes/recipes/security/advisories/GHSA-f2gw-c2c7-59v7
• https://github.com/TandoorRecipes/recipes/security/advisories/GHSA-f2gw-c2c7-59v7

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