CVSS 4.0
5.1 mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:NCVE-2026-42259
Medium (5.1). EPSS 0.3% chance of exploitation in the next 30 days. Fixed in @saltcorn/server 1.4.6, 1.5.6, 1.6.0-beta.5.
Saltcorn is an extensible, open source, no-code database application builder. Prior to versions 1.4.6, 1.5.6, and 1.6.0-beta.5, Saltcorn validates the post-login dest parameter with a string check that only blocks :/ and //. Because all WHATWG-compliant browsers normalise backslashes (\) to forward slashes (/) for special schemes, a payload such as /\evil.com/path slips through is_relative_url(), is emitted unchanged in the HTTP Location header, and causes the browser to navigate cross-origin to an attacker-controlled domain. The bug is reachable on a default install and only requires a victim who can be tricked into logging in via a crafted Saltcorn URL. This issue has been patched in versions 1.4.6, 1.5.6, and 1.6.0-beta.5.
Severity
- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 27% of CVEs (scores of 2026-10-31)
- CWE
- CWE-601
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-f3g8-9xv5-77gv | npm | @saltcorn/server | <1.4.6 | 1.4.6 |
| GHSA-f3g8-9xv5-77gv | npm | @saltcorn/server | >=1.5.0-beta.0 <1.5.6 | 1.5.6 |
| GHSA-f3g8-9xv5-77gv | npm | @saltcorn/server | >=1.6.0-alpha.0 <1.6.0-beta.5 | 1.6.0-beta.5 |