CVE-2026-4296
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk37th percentile - higher than 37% of all known CVEs
Summary
W GitHub Enterprise Server zidentyfikowano podatność na niepoprawny wyrażenie regularne, która umożliwiała atakującemu ominięcie walidacji URI przekierowania OAuth. Atakujący mógł stworzyć złośliwy link autoryzacyjny, który po kliknięciu przez ofiarę przekierowywałby kod autoryzacji OAuth na kontrolowaną przez atakującego domenę.
Risk Assessment
Ta podatność może prowadzić do nieautoryzowanego dostępu do kont ofiar z uprawnieniami przyznanymi aplikacji OAuth, co stwarza poważne zagrożenie dla bezpieczeństwa danych organizacji.
Recommendation
Zaleca się aktualizację GitHub Enterprise Server do wersji 3.20.1 lub nowszej, aby usunąć tę podatność oraz przeglądanie i monitorowanie aplikacji OAuth w celu wykrycia potencjalnych nadużyć.
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Original NVD description (English source)
An incorrect regular expression vulnerability was identified in GitHub Enterprise Server that allowed an attacker to bypass OAuth redirect URI validation. An attacker with knowledge of a first-party OAuth application's registered callback URL could craft a malicious authorization link that, when clicked by a victim, would redirect the OAuth authorization code to an attacker-controlled domain. This could allow the attacker to gain unauthorized access to the victim's account with the scopes granted to the OAuth application. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.1, 3.19.5, 3.18.8, 3.17.14, 3.16.17, 3.15.21, 3.14.26. This vulnerability was reported via the GitHub Bug Bounty program.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

