Read the docs
TI-2026-76336 Aliases CVE-2026-112103GHSA-93rm-6gqp-hr45

Certificate validation flaw in fatfree-core HTTP Client

Priority LOW 28CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
None
Impact type
Security bypass, Spoofing
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-287 and CWE-295.

Summary

f3-factory fatfree-core up to 3.9.2 has an improper certificate validation flaw (CWE-295) in the _curl function of web.php in the HTTP Client component. A remote attacker can trigger it, but the attack is highly complex and the exploitability is rated difficult. The flaw can lower integrity.

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

Description from the CNA

A vulnerability has been found in f3-factory fatfree-core up to 3.9.2. This vulnerability affects the function _curl of the file web.php of the component HTTP Client. Such manipulation leads to improper certificate validation. The attack may be performed from remote. Attacks of this nature are highly complex. It is stated that the exploitability is difficult. Upgrading to version 3.9.3 is able to resolve this issue. The name of the patch is a2c755c8dc9ad0eb7d5fd261b09aff90f649433c. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00384 32nd percentileScored 2026-11-07
Fix Fixed fatfree-core (f3-factory): 3.9.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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
f3-factoryfatfree-core3.9.0; 3.9.1; 3.9.23.9.3Patch availableCNA
  • fatfree-core Vendorf3-factory Affected 3.9.0; 3.9.1; 3.9.2 Fixed in 3.9.3 Patch available CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:f3-factory:fatfree-core:*:*:*:*:*:*:*:*———
  • cpe:2.3:a:f3-factory:fatfree-core:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

Upgrade f3-factory fatfree-core to version 3.9.3, which fixes the issue (patch a2c755c8dc9ad0eb7d5fd261b09aff90f649433c).

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

  • Fix · CNA fatfree-core (f3-factory) Fixed in 3.9.3

Timeline

  1. 2026-10-19 Threatist record created from CVE-2026-112103
  2. 2026-10-19 Alias added: GHSA-93rm-6gqp-hr45
  3. 2026-10-19 CISA SSVC decision points changed
  4. 2026-10-19 Priority changed: MEDIUM → LOW

References

Patch 2

Other 2

Sources

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