CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2026-115864 Monoceros versions before 0.30 for Perl allow a request declaring a large Content-Length to kill a worker by exhausting memory
High (7.5). EPSS 0.6% estimated probability of exploitation activity in the next 30 days.
Monoceros versions before 0.30 for Perl allow a request declaring a large Content-Length to kill a worker by exhausting memory.
The request body is read in a loop that asks sysread for all of the remaining declared length at once. Perl grows the read buffer to that size before any data arrives, so a length larger than available memory makes the worker exit with an uncatchable out of memory error before the application is called.
A remote attacker can force a worker restart with each request of a few bytes.
Severity
- EPSS
- 0.6% estimated probability of exploitation activity in the next 30 days; 50th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CISA's assessment (SSVC)
- Exploitation: none · Automatable: yes · Technical impact: partial, assessed 2026-11-12. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWE
- CWE-789 Memory Allocation with Excessive Size Value
- Published
- Modified
- Assigned by
- CPANSec (CNA)
- NVD analysis
- Deferred: the NVD does not plan to analyze it
- Record from
- the NVD, synced
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Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| Monoceros | before 0.30 |
History
- Scored 7.5 high
- The NVD deferred its analysis
Changes since this site first stored the record. The same for every record: /api/public/changes.