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SCA: security update for github.com/oauth2-proxy/oauth2-proxy/v7 (GHSA-7x63-xv5r-3p2x)

high Tenable Cloud Security Plugin ID 440451

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - OAuth2 Proxy is a reverse proxy that provides authentication using OAuth2 providers. Versions 7.5.0
 through 7.15.1 may trust a client-supplied `X-Forwarded-Uri` header when `--reverse-proxy` is enabled and
 `--skip-auth-regex` or `--skip-auth-route` is configured. An attacker can spoof this header so OAuth2
 Proxy evaluates authentication and skip-auth rules against a different path than the one actually sent to
 the upstream application. This can result in an unauthenticated remote attacker bypassing authentication
 and accessing protected routes without a valid session. Impacted users are deployments that run
 oauth2-proxy with `--reverse-proxy` enabled and configure at least one `--skip-auth-regex` or `--skip-
 auth-route` rule. This issue is patched in `v7.15.2`. Some workarounds are available for those who cannot
 upgrade immediately. Strip any client-provided `X-Forwarded-Uri` header at the reverse proxy or load
 balancer level; explicitly overwrite `X-Forwarded-Uri` with the actual request URI before forwarding
 requests to OAuth2 Proxy; restrict direct client access to OAuth2 Proxy so it can only be reached through
 a trusted reverse proxy; and/or remove or narrow `--skip-auth-regex` / `--skip-auth-route` rules where
 possible. For nginx-based deployments, ensure `X-Forwarded-Uri` is set by nginx and not passed through
 from the client. (CVE-2026-40575)

Solution

Update the github.com/oauth2-proxy/oauth2-proxy/v7 library and its related packages to version 7.15.2 or later.

See Also

https://github.com/advisories/GHSA-7x63-xv5r-3p2x

Plugin Details

Severity: High

ID: 440451

Version: Revision 1.7

Type: Local

Family: SCA Checks

Published: 4/16/2026

Updated: 6/30/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.61

Vendor

Vendor Severity: Critical

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N

CVSS Score Source: CVE-2026-40575

CVSS v3

Risk Factor: High

Base Score: 8.7

Temporal Score: 7.6

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 4/15/2026

Vulnerability Publication Date: 4/15/2026

Reference Information

CVE: CVE-2026-40575

cwe: CWE-290