CVE-2026-46491SimpleSAMLphp casserver FileSystemTicketStore path traversal allows out-of-ticket-directory read/unserialize and conditional deletion
- 8.6HighCVSS base score
- 0.42%Exploitation in 30 daysEPSS · top 63% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
SimpleSAMLphp-casserver is a CAS 1.0 and 2.0 compliant CAS server in the form of a SimpleSAMLphp module. Prior to version 7.0.3, simplesamlphp-module-casserver builds file paths for the file-based CAS ticket store by directly concatenating the configured ticket directory with an attacker-controlled ticket identifier. Public CAS validation/proxy endpoints pass attacker-controlled ticket / pgt query parameters into this store. In deployments using FileSystemTicketStore, a remote attacker can use path traversal sequences such as ../target.serialized to make the CAS server read and unserialize files outside the ticket directory. In the CAS 1.0 validation flow, the same attacker-selected path is also passed to deleteTicket() immediately after getTicket() returns, which can delete the target file when it is readable by the PHP process, deletable under the PHP process filesystem permissions, and unserializes to a value compatible with the ?array return type. This issue has been patched in version 7.0.3.
Timeline
ID reserved
By GitHub_M
- 26 days later
· 26 days later
Published
- 1 day later
· 1 day later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L |
| NVDNVD · Deferred | 3.1 | High8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L |
- EPSS (exploitation in 30 days)
- 0.42% · top 63% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.6.
Affected products
simplesamlphp · simplesamlphp-module-casserver
- affected < 7.0.3
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Packagistsimplesamlphp/simplesamlphp-module-casserverGHSA-jrrg-99xh-5j2q (opens in a new tab)
References
References3
- https://github.com/simplesamlphp/simplesamlphp-module-casserver/security/advisories/GHSA-jrrg-99xh-5j2q (opens in a new tab)x_refsource_CONFIRM
- https://github.com/simplesamlphp/simplesamlphp-module-casserver/commit/b84f3e4ed57c4d97e0dc73df102e7eff831a681f (opens in a new tab)x_refsource_MISC
- https://github.com/simplesamlphp/simplesamlphp-module-casserver/releases/tag/v7.0.3 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-35871 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-jrrg-99xh-5j2q (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-46491)Record last updated .