PHP Object Injection Vulnerability in DokuWiki Affects Multiple Versions
CVE-2026-113356

7.7HIGH

Key Information:

Vendor

Dokuwiki

Status
Dokuwiki
Vendor
CVE Published:
20 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-113356?

DokuWiki versions prior to 2026-07-14c are susceptible to a PHP object injection vulnerability within the Draft::getDraftText() method. This issue arises due to the lack of restrictions on allowed classes when passing draft file contents to the unserialize() function. Authenticated users with edit rights can exploit this vulnerability by executing concurrent draft rewrites, effectively splicing serialized data. This manipulation can lead to the instantiation of potentially dangerous classes such as MemoryIndex or Installer, which may allow for unauthorized file writing, deletion, and the execution of arbitrary code.

Affected Version(s)

DokuWiki 0 < 2026-07-14c

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-113356 - Proof of Concept

References

https://github.com/dokuwiki/dokuwiki/issues/4752
issue-tracking
https://gist.github.com/sebastianosrt/a0c0252ca335e8e8b2c...
exploittechnical-description
https://github.com/dokuwiki/dokuwiki/commit/1531802afb2ac...
patch

CVSS V4

Score:
7.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

sebsrt
.