Vulnerability in Spatie Url-Signer
CVE-2026-121589
A weakness has been identified in spatie url-signer up to 2.1.3. Affected is the function AbstractUrlSigner::validate of the file AbstractUrlSigner.php of the component URL Validation. This manipulation of the argument expires causes incorrect type conversion. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 2.1.4 is able to address this issue. Patch name: 86af3355388210668f6bfbe9007bd6545d4942ad. It is recommended to upgrade the affected component.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Spatie Url-Signer — versions 2.1.0, 2.1.1, 2.1.2
Weakness classification (CWE)
References
- vuldb.com/vuln/430430 (technical-description, vdb-entry)
- vuldb.com/vuln/430430/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-121589 (third-party-advisory)
- vuldb.com/submit/1021957 (third-party-advisory)
- github.com/spatie/url-signer/commit/86af3355388210668f6bfbe9007bd6545d4942ad (patch)
- github.com/spatie/url-signer/releases/tag/2.1.4 (patch)
- github.com/spatie/url-signer/ (product)
Frequently asked questions
- What is CVE-2026-121589?
- CVE-2026-121589 is a medium-severity vulnerability in Spatie Url-Signer, classified under Incorrect Type Conversion or Cast. CVSS score: 5.3/10. Published 2026-11-04.
- How severe is CVE-2026-121589?
- Medium severity. CVSS v3 base score is 5.3 out of 10.