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Vulnerability record · CVE-2017-1000070 · published 17 July 2017

CVE-2017-1000070: Oauth2 proxy project oauth2 proxy open redirect vulnerability

OOauth2 Proxy Project · Oauth2 Proxy

The Bitly oauth2_proxy in version 2.1 and earlier was affected by an open redirect vulnerability during the start and termination of the 2-legged OAuth flow. This issue was caused by improper input validation and a violation of RFC-6819

6.1 CVSS 3.0 Medium EPSS 1.00% · top 38.8% CWE-601 · Open redirect
6.1CVSS 3.0 base score, v2 5.8
1.00%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

The Bitly oauth2_proxy in version 2.1 and earlier was affected by an open redirect vulnerability during the start and termination of the 2-legged OAuth flow. This issue was caused by improper input validation and a violation of RFC-6819

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/bitly/oauth2_proxy/pull/359 PatchThird Party Advisory
https://tools.ietf.org/html/rfc6819#section-5.2.3.5 Technical Description
https://github.com/bitly/oauth2_proxy/pull/359 PatchThird Party Advisory
https://tools.ietf.org/html/rfc6819#section-5.2.3.5 Technical Description

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-1000070), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.