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CVE-2026-123519— Vikunja before 2.7.1 Memory Exhaustion DoS via WeKan and Vikunja-File Imports

Quick assessment

Affected

go-vikunja vikunja

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.

Vikunja 2.7.1 之前的版本存在拒绝服务（DoS）漏洞：已认证用户可通过上传无项目数量限制的 WeKan 或 vikunja-file 导入文件，耗尽 API 进程内存。攻击者可向 WeKan 迁移接口提交一个约 22 MB 的 WeKan JSON 文件，其中包含数十万张卡片或重复的 ID，从而触发内存溢出（OOM）并导致服务实例崩溃。

CVSS 6.5 · Medium Updated Nov 08, 2026

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

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Vulnerability Information

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Vulnerability Title

Vikunja before 2.7.1 Memory Exhaustion DoS via WeKan and Vikunja-File Imports

Source: CVE Program / CVE List V5

Vulnerability Description

Vikunja before 2.7.1 contains a denial of service vulnerability that allows authenticated users to exhaust API process memory by uploading WeKan or vikunja-file imports with no item-count cap. Attackers can submit a ~22 MB WeKan JSON with hundreds of thousands of cards or duplicate IDs to the wekan migrate endpoint, triggering OOM and crashing the instance.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

不加限制或调节的资源分配

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
go-vikunja	vikunja	0 ~ 2.7.1	-

II. Public POCs for CVE-2026-123519

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-123519

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Other References for CVE-2026-123519 (2)

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-g2xc-jv9q-46wq vendor-advisory
https://www.vulncheck.com/advisories/vikunja-before-2.7.1-memory-exhaustion-dos-via-wekan-and-vikunja-file-imports third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-123519

Same Patch Batch · go-vikunja · 2026-11-08 · 39 CVEs total

CVE-2026-123531	8.8 HIGH	Vikunja 1.0.0 before 2.7.1 Pagination Limit Bypass via page=0 Parameter
CVE-2026-123520	7.1 HIGH	Vikunja 0.18.0 before 2.7.1 Privilege Escalation via Account Deletion
CVE-2026-123522	7.1 HIGH	Vikunja before 2.7.1 Task Information Disclosure via Kanban Bucket Move Webhook
CVE-2026-123497	6.8 MEDIUM	Vikunja veans before 2.7.1 HTTPS to HTTP Downgrade in Server Discovery
CVE-2026-123528	6.8 MEDIUM	Vikunja before 2.7.1 Insufficient Session Expiration via HTTP Token Middleware
CVE-2026-123513	6.8 MEDIUM	Vikunja before 2.7.1 Auth Token Leak via API URL Change
CVE-2026-123525	6.5 MEDIUM	Vikunja before 2.7.1 Memory Exhaustion DoS via Trello, Todoist and Microsoft To Do Migrati
CVE-2026-123523	6.5 MEDIUM	Vikunja before 2.7.1 Memory Exhaustion via Unbounded Avatar Size Cache
CVE-2026-123501	6.5 MEDIUM	Vikunja before 2.7.1 Memory Exhaustion DoS via Unbounded Image Decodes
CVE-2026-123500	6.2 MEDIUM	Vikunja before 2.7.1 Insecure Permissions on Dump Archive via vikunja dump
CVE-2026-123512	6.1 MEDIUM	Vikunja before 2.7.1 Sensitive Token Exposure via URL Query in Access Logs
CVE-2026-123499	5.9 MEDIUM	Vikunja veans before 2.7.1 Credential Leak via Repo-Controlled .veans.yml Server
CVE-2026-123530	5.9 MEDIUM	Vikunja before 2.7.1 Missing Step-Up Authentication via TOTP Enrollment Endpoints
CVE-2026-123521	5.9 MEDIUM	Vikunja before 2.7.1 Password Brute-Force via TOTP Disable Endpoint
CVE-2026-123524	5.7 MEDIUM	Vikunja 0.23.0 before 2.7.1 Information Disclosure via Webhook related_tasks Payload
CVE-2026-123505	5.5 MEDIUM	Vikunja before 2.7.1 World-Readable Local File Storage and SQLite Database
CVE-2026-123493	5.4 MEDIUM	Vikunja from 2.4.0 before 2.7.1 Authentication Bypass via Bot API Tokens
CVE-2026-123526	5.4 MEDIUM	Vikunja before 2.7.1 Mass Assignment via Team external_id Field
CVE-2026-123506	5.4 MEDIUM	Vikunja 2.2.0 before 2.7.1 Token Scope Bypass via Project Webhook Endpoints
CVE-2026-123503	5.4 MEDIUM	Vikunja before 2.7.1 Improper Authorization in Kanban Bucket Deletion

Showing top 20 of 39 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: vikunja

Same vendor: go-vikunja

Same weakness: CWE-770