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TI-2026-75527 Aliases CVE-2026-59966

Regular expression denial of service in Tandoor Recipes automations

Priority MEDIUM 59CWE-1333Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-1333.

Summary

Tandoor Recipes before 2.6.10 runs user-defined Automation regular expressions with Python re.sub() without complexity validation or an execution timeout. When an authenticated user stores a catastrophic-backtracking pattern, a user in the same Space who imports a matching recipe can occupy a Gunicorn worker until the request times out. This can exhaust worker slots and make the service unavailable to users (CWE-1333).

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00319 24th percentileScored 2026-11-07
Fix Fixed recipes (TandoorRecipes): 2.6.10

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TandoorRecipesrecipesbefore 2.6.102.6.10Patch availableCNA
  • recipes VendorTandoorRecipes Affected before 2.6.10 Fixed in 2.6.10 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:tandoor:recipes:*:*:*:*:*:*:*:*——TandoorRecipes
  • cpe:2.3:a:tandoor:recipes:*:*:*:*:*:*:*:* Versions — — ·TandoorRecipes

Remediation

Upgrade Tandoor Recipes to version 2.6.10, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA recipes (TandoorRecipes) Fixed in 2.6.10

Timeline

  1. 2026-10-18 Threatist record created from CVE-2026-59966

References

Other 3

  • TI-2026-25582 Tandoor Recipes Vulnerable to Unrestricted Brute-Force via BasicAuthentication CVSS 3.1CRITICAL 9.1
  • TI-2025-16996 Tandoor Recipes - SSTI - Remote Code Execution CVSS 3.1CRITICAL 10.0
  • TI-2026-25583 SQL injection in TandoorRecipes recipes CVSS 4.0HIGH 7.7
  • TI-2026-27618 Tandoor Recipes — `amount`/`unit` bypass serializer in `food/{id}/shopping/` CVSS 3.1HIGH 7.3
  • TI-2025-16998 Tandoor Recipes - Stored XSS through Unrestricted File Upload CVSS 3.1HIGH 8.7
  • TI-2026-75529 Authorization bypass in Tandoor Recipes exposes private recipe steps CVSS 3.1HIGH 8.1
See all 28 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences