Vulnerability · Published May 28, 2026 · Assigned by GitHub_M

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

Medium 6.1

In plain English

A medium-severity open redirect in speakr from murtaza-nasir. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.2%top 91.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
murtaza-nasir	speakr	< 0.8.20-alpha

Weakness: CWE-601 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

https://github.com/murtaza-nasir/speakr/security/advisories/GHSA-5cpp-mqgh-4c38 x_refsource_CONFIRM