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TI-2026-80990 Aliases CVE-2026-116826GHSA-4vj3-p3vv-p25q

Server-side request forgery in YesWiki page duplication API

Priority LOW 35CWE-918Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.

Summary

YesWiki before 4.7.0 contains a server-side request forgery flaw in DuplicationManager::downloadFile(), tracked as CWE-918. An authenticated administrator can make the server send arbitrary outbound requests through the files array of the page duplication API. The server stores the responses in the publicly accessible files/ directory, so a request for file:// or internal URLs can expose local files, cloud metadata or database credentials.

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

Description from the CNA

YesWiki before 4.7.0 contains a server-side request forgery vulnerability in DuplicationManager::downloadFile() that allows authenticated administrators to make arbitrary outbound requests via the files array. Attackers can POST file:// or internal URLs to /api/pages/{tag}/duplicate, storing local files, cloud metadata, or database credentials in the publicly accessible files/ directory.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00241 15th percentileScored 2026-11-07
Fix Fixed yeswiki (YesWiki): 4.7.0

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
YesWikiyeswikibefore 4.7.04.7.0Patch availableCNA
  • yeswiki VendorYesWiki Affected before 4.7.0 Fixed in 4.7.0 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:yeswiki:yeswiki:*:*:*:*:*:*:*:*——YesWiki
  • cpe:2.3:a:yeswiki:yeswiki:*:*:*:*:*:*:*:* Versions — — ·YesWiki

Remediation

Update YesWiki to version 4.7.0 or later, which fixes this issue.

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

  • Fix · CNA yeswiki (YesWiki) Fixed in 4.7.0

Fixed in the same release

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

  • Release ·

    yeswiki 4.7.0

    9 records Highest priority Priority HIGH 3 HIGH, 4 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2026-80984 SQL query disclosure in YesWiki via showreq parameterPriority HIGH 70
    • TI-2026-80991 Server-side request forgery in YesWiki Bazar CSV importPriority HIGH 69
    • TI-2026-80989 HTTP Signature replay in YesWiki ActivityPub inbox allows repeated actionsPriority HIGH 69
    Show all 9 records →

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-116826
  2. 2026-10-27 CISA SSVC decision points changed
  3. 2026-10-27 Priority changed: MEDIUM → LOW
  4. 2026-10-27 Alias added: GHSA-4vj3-p3vv-p25q

References

Advisory 1

  • 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