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

Quick assessment

Affected
Wikimedia Foundation Scribunto
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Wikimedia Scribunto是Wikimedia基金会的一个脚本开发工具。 Wikimedia Scribunto 1.45.0版本至1.45.2之前版本存在跨站脚本漏洞，该漏洞源于内存泄漏导致runJobs.php内存不足。

AI Predicted 6.5 Difficulty: Hard EPSS 0.43% · P35

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Wikimedia Foundation Scribunto 1.45.0< 1.45.2 affected
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I. Basic Information for CVE-2026-34089

Vulnerability Information
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Vulnerability Title
Memory leak in Scribunto causes runJobs.php to run out of memory
Source: CVE Program / CVE List V5
Vulnerability Description
Vulnerability in Wikimedia Foundation Scribunto. This issue affects Scribunto: from 1.45.0 before 1.45.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Wikimedia Scribunto 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wikimedia Scribunto是Wikimedia基金会的一个脚本开发工具。 Wikimedia Scribunto 1.45.0版本至1.45.2之前版本存在跨站脚本漏洞，该漏洞源于内存泄漏导致runJobs.php内存不足。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Wikimedia Foundation Scribunto 1.45.0 ~ 1.45.2 -

II. Public POCs for CVE-2026-34089

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III. Intelligence Information for CVE-2026-34089

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Vendor Advisories for CVE-2026-34089 (1)

Same Patch Batch · Wikimedia Foundation · 2026-05-11 · 11 CVEs total

CVE-2026-34090 Suggested investigations: Handle suppressed usernames
CVE-2026-34092 Block UI elements in 'tools'-sidebar shows presence of an autoblocked IP
CVE-2026-34091 User localization leaked by AbuseFilter + EventStream
CVE-2026-34086 AbuseFilter misuses ::userCanBitfield, exposing access-controlled information
CVE-2026-34087 Users API leaks whether privileged users have their user groups disabled for lack of 2FA
CVE-2026-34093 Special:UserRights allows viewing user rights from private wiki
CVE-2026-34094 Customized help link for page protection indicator is relative to subpage name, because th
CVE-2026-34095 action=raw with Special:Mypage subpage title responds with "Content-Type: text/html" on ct
CVE-2026-34088 RecentChanges entries expose suppressed content via generated log page html
CVE-2026-5266 Wikimedia Echo 信息泄露漏洞

IV. Related Vulnerabilities

Same product: Scribunto
Same vendor: Wikimedia Foundation

V. Comments for CVE-2026-34089

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