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CVE-2026-73529— Plainpad Missing Rate Limiting via POST /v1/sessions

Quick assessment

Affected
alextselegidis plainpad
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.

Alex Tselegidis Plainpad是Alex Tselegidis组织的一款自托管笔记应用。 Alex Tselegidis Plainpad 1.1.1及之前版本存在授权问题漏洞，该漏洞源于缺少速率限制，API节流配置未附加到任何路由，可能导致未经身份验证的攻击者向POST /v1/sessions端点发送无限制的登录请求，并触发CPU耗尽。

CVSS 5.3 · Medium EPSS 0.30% · P22

Affected Version Matrix 2

VendorProduct Version RangeStatus
alextselegidis plainpad ≤ 1.1.1 affected
d3823fc595b5d8f842a6fd7dfe49b7852a10fdac unaffected
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I. Basic Information for CVE-2026-73529

Vulnerability Information
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Vulnerability Title
Plainpad Missing Rate Limiting via POST /v1/sessions
Source: CVE Program / CVE List V5
Vulnerability Description
Plainpad through 1.1.1, fixed in commit d3823fc, contains a missing rate limiting vulnerability that allows unauthenticated attackers to send unbounded login requests to the POST /v1/sessions endpoint due to dead code in App\Http\Kernel.php that is never instantiated under the Laravel 11+ skeleton, leaving the API throttle configuration unattached to any route. Attackers can exploit this by sending unlimited credential attempts with no lockout or CAPTCHA enforcement, and additionally trigger CPU exhaustion by forcing repeated bcrypt comparisons on each request.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
过多认证尝试的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Alex Tselegidis Plainpad 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Alex Tselegidis Plainpad是Alex Tselegidis组织的一款自托管笔记应用。 Alex Tselegidis Plainpad 1.1.1及之前版本存在授权问题漏洞，该漏洞源于缺少速率限制，API节流配置未附加到任何路由，可能导致未经身份验证的攻击者向POST /v1/sessions端点发送无限制的登录请求，并触发CPU耗尽。
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
alextselegidis plainpad 0 ~ 1.1.1 -

II. Public POCs for CVE-2026-73529

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III. Intelligence Information for CVE-2026-73529

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Patches & Fixes for CVE-2026-73529 (1)

Vendor Advisories for CVE-2026-73529 (1)

IV. Related Vulnerabilities

Same product: plainpad
Same vendor: alextselegidis
Same weakness: CWE-307

V. Comments for CVE-2026-73529

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