CVE-2026-48595
HIGHAuthorization header leaks to third-party origin on cross-origin redirect in Tesla.Middleware.FollowRedirects
Title source: cnaExploitation Summary
EIP tracks 2 public exploits for CVE-2026-48595. PoCs published by jenniferreire26, erickando33.
AI-analyzed exploit summary The repository claims to exploit CVE-2026-48595, an improper handling of case sensitivity in elixir-tesla's Tesla.Middleware.FollowRedirects, but lacks actual exploit code. Instead, it directs users to an external download link (tinyurl.com), which is a common tactic for distributing malware or fake exploits.
Description
Improper Handling of Case Sensitivity vulnerability in elixir-tesla tesla allows credential leakage to a third-party origin on cross-origin redirects. Tesla.Middleware.FollowRedirects strips security-sensitive headers on cross-origin redirects using a case-sensitive string comparison against a lowercase filter list (@filter_headers ["authorization", "host"]). HTTP header names are case-insensitive per RFC 7230, but Tesla preserves header keys verbatim as supplied by the caller without normalizing case. A header set as {"Authorization", "Bearer …"} (the RFC 7235 canonical casing used by virtually all HTTP libraries and documentation) does not match the lowercase filter entry and is forwarded to the redirect destination. An attacker who can control or influence a Location: response seen by the client (via their own endpoint, a redirect-open upstream, or a compromised origin) receives the bearer token or other Authorization material on the cross-origin request. This issue affects tesla: from 1.4.0 before 1.18.3.
Exploits (2)
The repository claims to exploit CVE-2026-48595, an improper handling of case sensitivity in elixir-tesla's Tesla.Middleware.FollowRedirects, but lacks actual exploit code. Instead, it directs users to an external download link (tinyurl.com), which is a common tactic for distributing malware or fake exploits.
The repository claims to exploit CVE-2026-48595, an improper handling of case sensitivity in elixir-tesla's Tesla.Middleware.FollowRedirects, but lacks actual exploit code. Instead, it directs users to an external download link, which is a common tactic for distributing malware or fake exploits.
References (4)
Scores
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X