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CVE-2026-86826— BackWPup < 5.7.7 - Unauthenticated Sensitive Data Disclosure via Restore Working Directory on NGINX

Quick assessment

Affected
Unknown BackWPup
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.

BackWPup 插件（版本低于 5.7.7）未能正确限制对其在备份恢复过程中所使用的临时工作目录的 Web 访问权限。这会导致未认证的攻击者在那些不尊重 .htaccess 规则的 Web 服务器（例如 NGINX）上，下载由中断的恢复操作遗留的完整备份归档文件，其中包括数据库转储、网站文件以及敏感信息（如用户凭据和密钥等）。

AI Predicted 7.5 Difficulty: Easy

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-86826

Vulnerability Information
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Vulnerability Title
BackWPup < 5.7.7 - Unauthenticated Sensitive Data Disclosure via Restore Working Directory on NGINX
Source: CVE Program / CVE List V5
Vulnerability Description
The BackWPup WordPress plugin before 5.7.7 does not properly restrict web access to the working directory it uses during backup restores, allowing unauthenticated attackers, on webservers that do not honour .htaccess rules such as NGINX, to download the full backup archive (database dump and site files, including credentials and secret keys) left behind by an interrupted restore.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown BackWPup 0 ~ 5.7.7 -

II. Public POCs for CVE-2026-86826

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III. Intelligence Information for CVE-2026-86826

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Other References for CVE-2026-86826 (1)

Same Patch Batch · Unknown · 2026-10-08 · 24 CVEs total

CVE-2026-93509 6.5 MEDIUM Wallet System for WooCommerce 2.0.0 - 2.7.10 - Subscriber+ Wallet Balance Manipulation via
CVE-2026-103517 5.3 MEDIUM Airwallex Online Payments Gateway < 1.36.0 - Unauthenticated Payment Bypass via Forged Web
CVE-2026-104671 5.3 MEDIUM TutorStarter < 4.0.4 - Unauthenticated User Registration Bypass via AJAX
CVE-2026-105190 5.3 MEDIUM Easy Digital Downloads < 3.7.1 - Unauthenticated Account Creation with Registration Disabl
CVE-2026-103309 GPTranslate < 2.34.14 - Unauthenticated Stored XSS via REST API Translation Storage
CVE-2026-103646 Ultimate Multisite < 2.17.0 - Unauthenticated Authentication Bypass via 'email_address' Pa
CVE-2026-104646 Image Photo Gallery Final Tiles Grid < 3.6.14 - Contributor+ Stored XSS via Gallery Shortc
CVE-2026-104645 Image Photo Gallery Final Tiles Grid < 3.6.14 - Contributor+ Arbitrary Gallery Cloning, Im
CVE-2026-103692 Frontend Dashboard 3.0.0 - 3.0.4 - Unauthenticated Privilege Escalation via Arbitrary Func
CVE-2026-105195 Booking Calendar 10.15 - 11.8.2 - Editor+ Arbitrary Option Disclosure
CVE-2026-105197 LatePoint < 5.6.5 - Agent+ Arbitrary Order, Customer and Transaction Deletion via IDOR
CVE-2026-105198 LatePoint < 5.7.3 - Unauthenticated Customer PII Disclosure via IDOR
CVE-2026-105194 Easy Digital Downloads < 3.7.1 - Subscriber+ Sensitive Information Disclosure via User Dow
CVE-2026-105196 LatePoint < 5.6.9 - Agent+ Cross-Agent Data Disclosure and Modification via Abilities API
CVE-2026-105193 Booking Calendar < 11.8 - Unauthenticated Booking Information Disclosure and Modification
CVE-2026-86827 BackWPup 3.3 - 5.7.6 - Unauthenticated Backup Job Execution via wp-cron.php
CVE-2026-86828 BackWPup < 5.7.7 - Admin+ Path Traversal to RCE via Restore PclZip Fallback
CVE-2026-105260 Database Addon For WPForms < 1.1.1 - Arbitrary Form Entry Deletion via CSRF
CVE-2026-94246 Wallet System for WooCommerce 2.0.0 - 2.7.10 - Subscriber+ Forged Wallet Withdrawal Reques
CVE-2026-94244 Wallet System for WooCommerce < 2.8.0 - Subscriber+ Store-Wide Wallet Transaction Disclosu

Showing top 20 of 24 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: BackWPup
Same vendor: Unknown

V. Comments for CVE-2026-86826

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