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TI-2026-80080 Aliases CVE-2026-116011GHSA-88wj-6c62-8f7x

Uncontrolled recursion in Crow JSON parsing crashes server remotely

Priority MEDIUM 45CWE-674Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-674.

Summary

CrowCpp Crow versions from 0 before 1.3.4 are affected. The crow::json::load() function uses uncontrolled recursion (CWE-674) when it parses nested JSON. An unauthenticated remote attacker can send a request body with thousands of nested objects to exhaust the worker thread stack, which terminates the process and drops all connections.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

Crow before 1.3.4 contains an uncontrolled recursion vulnerability in crow::json::load() that allows remote unauthenticated attackers to crash the server by sending deeply nested JSON. Attackers can send a request body with thousands of nested objects to exhaust the worker thread stack, terminating the process and dropping all connections.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00683 52nd percentileScored 2026-11-07
Fix Fixed Crow (CrowCpp): 1.3.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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
CrowCppCrowbefore 1.3.41.3.4Patch availableCNA
  • Crow VendorCrowCpp Affected before 1.3.4 Fixed in 1.3.4 Patch available CNA

Remediation

Upgrade Crow to version 1.3.4, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA Crow (CrowCpp) Fixed in 1.3.4

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-24 Threatist record created from CVE-2026-116011
  2. 2026-10-24 Alias added: GHSA-88wj-6c62-8f7x
  3. 2026-10-25 Priority changed: MEDIUM → LOW
  4. 2026-10-26 CISA SSVC decision points changed
  5. 2026-10-26 Priority changed: LOW → MEDIUM
  6. 2026-11-06 Affected versions changed · Red Hat
  7. 2026-11-06 CVSS score added · Red Hat

References

Patch 1

Advisory 1

Other 2

  • TI-2023-11366 HTTP response splitting in Crow CVSS 3.1MEDIUM 6.5
  • TI-2022-15735 Crow before 1.0+4 has a heap-based buffer overflow via the function qs_parse in… CVSS 3.1CRITICAL 9.8
  • TI-2022-18200 HTTP applications (servers) based on Crow through 1.0+4 may allow a Use-After-Free and… CVSS 3.1CRITICAL 9.8
  • TI-2022-18201 HTTP applications (servers) based on Crow through 1.0+4 may reveal potentially sensitive… CVSS 3.1HIGH 7.5
  • TI-2021-06154 Path traversal in Crow CVSS 3.1HIGH 7.5
  • TI-2021-06197 Content Injection CVSS 3.1MEDIUM 6.5

Sources

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