# CVE-2026-121589: spatie url-signer URL Validation AbstractUrlSigner.php validate type conversion

Status: published. Published: 2026-11-03. Updated: 2026-11-03.

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.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://github.com/spatie/url-signer/commit/86af3355388210668f6bfbe9007bd6545d4942ad
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://github.com/spatie/url-signer/releases/tag/2.1.4

## Affected products and versions

- spatie / url-signer: 2.1.0 (affected); 2.1.1 (affected); 2.1.2 (affected); 2.1.3 (affected); 2.1.4 (unaffected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 6.9 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P; source: CNA: VulDB

- CVSS 3.1: 5.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C; source: CNA: VulDB

- CVSS 3.0: 5.3 (medium); CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C; source: CNA: VulDB

- CVSS 2.0: 5 (medium); AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C; source: CNA: VulDB

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-704

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://vuldb.com/vuln/430430 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/430430/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-121589 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1021957 (CNA: VulDB; third-party-advisory)

- https://github.com/spatie/url-signer/commit/86af3355388210668f6bfbe9007bd6545d4942ad (CNA: VulDB; patch)

- https://github.com/spatie/url-signer/releases/tag/2.1.4 (CNA: VulDB; patch)

- https://github.com/spatie/url-signer/ (CNA: VulDB; product)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-121589; retrieved 2026-11-04; source updated 2026-11-03

Revision: eb93d2f73eb0358a08a73f761b7a13bdacd1f3c53001e1a0d4354bda07c0e44e

Canonical: https://y2.dev/cve/CVE-2026-121589

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