Catalyst::Seal versions before 0.03 for Perl allow one request to disable a path or route a later one past an authorization check via a dispatch memo keyed on the request path alone
Summary
| CVE | CVE-2026-85491 |
|---|---|
| State | PUBLISHED |
| Assigner | CPANSec |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-24 22:17:02 UTC |
| Updated | 2026-09-25 17:17:16 UTC |
| Description | Catalyst::Seal versions before 0.03 for Perl allow one request to disable a path or route a later one past an authorization check via a dispatch memo keyed on the request path alone. Catalyst::Seal replaces the dispatcher's prepare_action with a version that memoises how a path resolved: which dispatch type matched, at which level, and what was left over as arguments. The key is the request path and nothing else. Action roles that match on the method, content type, scheme or query make that resolution depend on state the key does not carry, so the memo answers for a request it was not built from. A path that resolves to no action is memoised as well, and replaying that entry returns without consulting any dispatch type, so no action is set and the request fails. A GET of a path whose action is declared POST-only therefore disables that path for every later request, the correct POST included. An entry that did resolve replays the level the earlier descent reached. Where a POST-only action sits below a shallower action on the same path, a GET memoises the shallow route, and a later POST is dispatched there with an auto() guarding the deeper controller never running. The memo is cleared only when an action is registered, which happens at setup, so an entry lasts for the life of the process, and its cap of 2048 entries bounds how many paths one caller can disable. In the configuration measured, the misroute lands on the less privileged action, so it is an authorization check not running rather than a privilege gain. |
Risk And Classification
Primary CVSS: v3.1 8.8 HIGH from ADP
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.003570000 probability, percentile 0.268940000 (date 2026-09-27)
Problem Types: CWE-706 | CWE-1023 | CWE-1023 CWE-1023 Incomplete Comparison with Missing Factors | CWE-706 CWE-706 Use of Incorrectly-Resolved Name or Reference
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | ADP | DECLARED | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
There are no known software configurations currently associated with this CVE in NVD or the CVE Program record.
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| metacpan.org/release/LNATION/Catalyst-Seal-0.03/changes | 9b29abf9-4ab0-4765-b253-1875cd9b441e | metacpan.org | |
| metacpan.org/release/LNATION/Catalyst-Seal-0.02/source/lib/Catalyst/Seal/D... | 9b29abf9-4ab0-4765-b253-1875cd9b441e | metacpan.org | |
| www.openwall.com/lists/oss-security/2026/09/24/8 | af854a3a-2127-422b-91ae-364da2661108 | www.openwall.com | |
| www.openwall.com/lists/oss-security/2026/09/24/9 | af854a3a-2127-422b-91ae-364da2661108 | www.openwall.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
Solutions
CNA: Upgrade to Catalyst-Seal 0.03 or later.
Workarounds
CNA: For deployments that are not able to upgrade to Catalyst-Seal 0.03, set CATALYST_SEAL=0 in the application's environment, which leaves the application as stock Catalyst.
There are currently no legacy QID mappings associated with this CVE.