smart_require stores results in a process-global hash with no bound and no eviction, and keeps an entry for every class name it is asked about, including names that failed to load, because the return value of the failed eval is stored before the error is checked. The key comes off the wire on the server side: _signature_method_class builds the class name from the signature_method parameter of the incoming message, and verify resolves it before any signature is checked.
A remote client chooses both how many entries are created and how long each key is. In a persistent server the hash grows for the life of the worker process until it exhausts memory. Header size limits bound the key length on the Authorization header path, but not on a POST body.
Analysis
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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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Vendor Solution
Upgrade to Net-OAuth 0.32 or later.
Tracking
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Sun, 16 Aug 2026 17:30:00 +0000
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Sun, 16 Aug 2026 14:00:00 +0000
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| Description | Net::OAuth versions before 0.32 for Perl allow memory exhaustion via unbounded caching of failed module loads in smart_require. smart_require stores results in a process-global hash with no bound and no eviction, and keeps an entry for every class name it is asked about, including names that failed to load, because the return value of the failed eval is stored before the error is checked. The key comes off the wire on the server side: _signature_method_class builds the class name from the signature_method parameter of the incoming message, and verify resolves it before any signature is checked. A remote client chooses both how many entries are created and how long each key is. In a persistent server the hash grows for the life of the worker process until it exhausts memory. Header size limits bound the key length on the Authorization header path, but not on a POST body. | |
| Title | Net::OAuth versions before 0.32 for Perl allow memory exhaustion via unbounded caching of failed module loads in smart_require | |
| Weaknesses | CWE-770 | |
| References |
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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: CPANSec
Published:
Updated: 2026-08-16T17:06:06.006Z
Reserved: 2026-08-10T15:44:58.172Z
Link: CVE-2026-72888
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-08-16T14:16:54.970
Modified: 2026-08-16T17:17:41.670
Link: CVE-2026-72888
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-08-16T15:30:04Z
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CWE-770
Allocation of Resources Without Limits or Throttling