{"id":"CVE-2026-49820","revision":"a407bfb42c124194bf3caef86e6db697","records":[{"revision":"a407bfb42c124194bf3caef86e6db697","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-49820","aliases":[],"title":"Probo has an open redirect bypass via path normalization","description":"Probo is a self-hostable governance, risk, and compliance (GRC) platform built for engineering and security teams. Probo's `saferedirect` package validates redirect URLs used across authentication flows (OIDC, SAML, session transfer, OAuth connectors, and trust-center magic links). Prior to version 0.19.3.1, the validator only inspected the second character of relative paths, so a URL like `/../\\evil.com` passed validation because the second character is `.`. Go's `http.Redirect` normalizes this path to `/\\evil.com` before setting the `Location` header. Browsers can interpret the backslash as a host separator and redirect the user to an external domain (`https://evil.com`), bypassing the intended same-origin restriction. This enables open-redirect phishing: an attacker can craft a `continue` parameter (or embed a malicious URL in a session-transfer token) that appears to originate from a trusted Probo domain but redirects victims elsewhere. This is fixed in `go.probo.inc/probo` 0.193.1 by normalizing relative paths with `path.Clean` before validation, rejecting backslashes (including percent-encoded `%5c`) anywhere in the path, and re-checking the normalized result for protocol-relative and backslash prefixes. Self-hosted deployments should upgrade to probod v0.194.1 or later. SaaS deployments on getprobo.com are patched. No practical workaround is available for self-hosted installations.","state":0,"publishedAt":"2026-08-13T14:36:34.645+00:00","modifiedAt":"2026-08-14T15:40:32.062+00:00","affected":[{"ecosystem":"Vendor product","name":"probo","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"getprobo\",\n                    \"product\": \"probo\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 0.193.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N","score":4.7,"severity":"MEDIUM"}],"references":["https://github.com/getprobo/probo/security/advisories/GHSA-x7qq-m748-8p2c","https://github.com/getprobo/probo/blob/main/SECURITY_NOTES.md"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-49820","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-49820","identifiers":["CVE-2026-49820"]},"retained":false,"historicalAffected":[]}],"coverage":[]}