TI-2026-66091 Aliases CVE-2026-104449 GHSA-h2q6-cgj7-p65g

YesWiki before 4.6.7 Unauthenticated Page Overwrite via Bazar id_fiche

HIGH 69CWE-639Published 2026-10-02 · Updated 2026-10-06

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

YesWiki before 4.6.7 contains an access control vulnerability allowing unauthenticated attackers to overwrite any existing wiki page, including pages whose write ACL restricts editing, via the Bazar entry-creation flow. Attackers can submit a crafted entry with an attacker-controlled id_fiche matching an existing page, overwriting its body for mass defacement and content destruction.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00349 28th percentileScored 2026-11-07

Fix Fixed yeswiki (YesWiki): 4.6.7

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

Vendor	Product	Affected versions	Fixed in	Status	Source
YesWiki	yeswiki	before 4.6.7	4.6.7	Patch available	CNA

yeswiki VendorYesWiki Affected before 4.6.7 Fixed in 4.6.7 Patch available CNA

CPE names Threatist (inferred) · 1

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

CPE	Versions	Role	Vendor
cpe:2.3:a:yeswiki:yeswiki::::::::	—	—	YesWiki

cpe:2.3:a:yeswiki:yeswiki:*:*:*:*:*:*:*:* Versions — — ·YesWiki

Remediation

Fix · CNA yeswiki (YesWiki) Fixed in 4.6.7

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-10-02
yeswiki 4.6.7
34 records Highest priority Priority HIGH 24 HIGH, 7 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2026-66114 YesWiki before 4.6.7 Missing Authorization via Attachment Download HandlerPriority HIGH 77
- TI-2026-66106 YesWiki before 4.6.7 SSRF via Bazar abonnements sync actor parameterPriority HIGH 77
- TI-2026-66104 YesWiki before 4.6.7 SQL Injection via nuagetag tags parameterPriority HIGH 77
Show all 34 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-104449
2026-10-03 Alias added: GHSA-h2q6-cgj7-p65g
2026-10-04 Priority changed: MEDIUM → LOW
2026-10-06 CISA SSVC decision points changed
2026-10-06 Priority changed: LOW → HIGH

References

Advisory 1

GitHub Security Advisory (GHSA-4388-phmh-jrw8)

TI-2026-37893 YesWiki has Unsafe eval() in Formula Calculator - Remote Code Execution (RCE) & Denial of Service (DoS) CVSS 3.1CRITICAL 9.8
TI-2026-34305 YesWiki: Unauthenticated SQL Injection CVSS 3.1CRITICAL 9.8
TI-2025-29089 YesWiki Vulnerable to Unauthenticated Site Backup Creation and Download CVSS 3.1CRITICAL 10.0
TI-2024-34399 Use of a Broken or Risky Cryptographic Algorithm in YesWiki CVSS 3.1CRITICAL 9.9
TI-2026-37882 YesWiki: Unauthenticated arbitrary page deletion via `{{erasespamedcomments}}` action CVSS 3.1CRITICAL 9.1
TI-2026-80227 SQL injection in YesWiki Bazar entry creation via date_maj_fiche CVSS 4.0HIGH 8.8

See all 85 →

Sources

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