CVE-2026-45307— Speakr: Open redirect in is_safe_url via parser mismatch on next parameter
Possible ATT&CK Techniques 1AI
T1189 · Drive-by CompromiseAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| murtaza-nasir | speakr | < 0.8.20-alpha | affected |
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I. Basic Information for CVE-2026-45307
Vulnerability Information
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Vulnerability Title
Speakr: Open redirect in is_safe_url via parser mismatch on next parameter
Source: NVD (National Vulnerability Database)
Vulnerability Description
Speakr is a personal, self-hosted web application designed for transcribing audio recordings. Prior to 0.8.20-alpha, the is_safe_url() helper used to validate post-login redirect targets applied urljoin(request.host_url, target) before parsing, while the controller passed the raw target to redirect(). A scheme-relative input such as ////evil.com resolved to a same-host URL during validation but was emitted verbatim in the Location header, where the browser interpreted it as a network-path-relative redirect to an attacker-controlled host. This vulnerability is fixed in 0.8.20-alpha.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Speakr 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Speakr是Murtaza Nasir个人开发者的一款自托管AI转录与智能笔记平台。 Speakr 0.8.20-alpha之前版本存在安全漏洞，该漏洞源于is_safe_url()验证函数在解析前应用urljoin，而控制器直接传递原始目标到redirect()，方案相对输入如////evil.com在验证时解析为同主机URL但在Location标头中逐字发出，浏览器将其解释为网络路径相对重定向到攻击者控制的主机。
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 |
|---|---|---|---|---|
| murtaza-nasir | speakr | < 0.8.20-alpha | - |
II. Public POCs for CVE-2026-45307
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-45307 (1)
IV. Related Vulnerabilities
Same weakness: CWE-601
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WeGIA: Middleware whitelist bypass → open redirect via Inter - CVE-2026-49059
WordPress Facebook for WooCommerce plugin <= 3.7.0 - Open Re - CVE-2026-44833
Snipe-IT: Open redirect vulnerability
V. Comments for CVE-2026-45307
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