CVE-2026-34089: Memory leak in Scribunto causes runJobs.php to run out of memory

High severity · published May 11, 2026

CVE-2026-34089

Memory leak in Scribunto causes runJobs.php to run out of memory

7.5

CVSS

0.3%

EPSS

On KEV

Description

Vulnerability in Wikimedia Foundation Scribunto. This issue affects Scribunto: from 1.45.0 before 1.45.2.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

None

Integrity

None

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.3% · higher than 28% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Scribunto · Wikimedia Foundation

1.45.0 before 1.45.2 · source: vendor, NVD

Affected product

Scribunto

Wikimedia Foundation

All Scribunto CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-34089

CVE.org

https://www.cve.org/CVERecord?id=CVE-2026-34089

Exploit

https://phabricator.wikimedia.org/T419168