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CVE-2026-45307— Speakr: Open redirect in is_safe_url via parser mismatch on next parameter

Quick assessment

Affected
murtaza-nasir speakr
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.

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。

CVSS 6.1 · Medium EPSS 0.15% · P5

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 1

VendorProduct Version RangeStatus
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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
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

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III. Intelligence Information for CVE-2026-45307

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Vendor Advisories for CVE-2026-45307 (1)

IV. Related Vulnerabilities

Same product: speakr
Same vendor: murtaza-nasir
Same weakness: CWE-601

V. Comments for CVE-2026-45307

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