CVE-2026-116128
Starlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodies
Published Oct 30, 2026
CVSS 3.1 · 7.5 High
EPSS < 1%
KEV · Not listed
Description
Starlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodies.
The decoder adds each read to one buffer of unconsumed input. Nothing limits the length of a chunk-size line, so a line without a CRLF grows the buffer for as long as the client keeps sending, and the read timeout restarts after every read. The data of a large chunk is also held in the buffer until the whole chunk has arrived.
A remote attacker can exhaust a worker's memory with a single request.
The decoder adds each read to one buffer of unconsumed input. Nothing limits the length of a chunk-size line, so a line without a CRLF grows the buffer for as long as the client keeps sending, and the read timeout restarts after every read. The data of a large chunk is also held in the buffer until the whole chunk has arrived.
A remote attacker can exhaust a worker's memory with a single request.
Affected Products
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CVE record
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NVD configurations
No data
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Red Hat packages
No data
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OpenCVE enrichment
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| unaffected |
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No data.
No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Kazuho | Starlet |
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Remediation
Vendor Solution
Upgrade to Starlet 0.33 or later.
Tracking
Advisories
Metrics
No CVSS v4.0
Attack Vector Network
Attack Complexity Low
Privileges Required None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
User Interaction None
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.384% probability within 30 days)
Exploitation none
Automatable yes
Technical Impact partial
References
History
Nov 7, 2026 7:30 AM
Scoring metrics updated
View changes
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Nov 4, 2026 12:30 AM
Added references. Scoring metrics updated
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| Type | Values Removed | Values Added |
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| References |
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| Metrics |
threat_severity
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cvssV3_1
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Oct 30, 2026 3:00 PM
First appearance in the feed. Affected vendors updated
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Kazuho
Kazuho starlet |
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| Vendors & Products |
Kazuho
Kazuho starlet |
Oct 30, 2026 1:00 PM
Description updated. Title updated. Weaknesses updated. Added references
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Starlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodies. The decoder adds each read to one buffer of unconsumed input. Nothing limits the length of a chunk-size line, so a line without a CRLF grows the buffer for as long as the client keeps sending, and the read timeout restarts after every read. The data of a large chunk is also held in the buffer until the whole chunk has arrived. A remote attacker can exhaust a worker's memory with a single request. | |
| Title | Starlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodies | |
| Weaknesses | CWE-770 | |
| References |
|
Weaknesses
