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CVE-2026-115865

Starlet versions before 0.33 for Perl allow a request declaring a large Content-Length to kill a worker by exhausting memory

7.5 HighFix available

Starlet versions before 0.33 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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.38%Up 0.1 points since Oct 31, 2026
90%50%10%1%

What each source reports

CVE List Score used 7.5

Starlet versions before 0.33 for Perl allow a request declaring a large Content-Length to kill a worker by exhausting memory

Starlet versions before 0.33 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.

Record
CVE-2026-115865
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-789
Updated
2026-11-06
EUVDEUVD-2026-113906 7.5

Starlet versions before 0.33 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.

Record
EUVD-2026-113906
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-06
GitHub AdvisoriesGHSA-xfc8-r6h3-qmmm 7.5

Starlet versions before 0.33 for Perl allow a request declaring a large Content-Length to kill a...

Starlet versions before 0.33 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.

Record
GHSA-xfc8-r6h3-qmmm
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-789
Updated
2026-11-06
NVD 7.5

Starlet versions before 0.33 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.

Record
CVE-2026-115865
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-789
Updated
2026-11-06
OSV 7.5

Starlet versions before 0.33 for Perl allow a request declaring a large Content-Length to kill a worker by exhausting memory

Starlet versions before 0.33 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.

Record
CVE-2026-115865
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-789
Updated
2026-11-07
OSVDEBIAN-CVE-2026-115865 7.5

Starlet versions before 0.33 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.

Record
DEBIAN-CVE-2026-115865
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-07
OSVUBUNTU-CVE-2026-115865 No score

Starlet versions before 0.33 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.

Record
UBUNTU-CVE-2026-115865
Updated
2026-11-05

Affected packages

Affected packages
PackageAffectedFixed
starlet
Debian:12
All versions, plus listed versions
0.31-20.31-30.32-10.33-1
None known
starlet
Debian:13
All versions, plus listed versions
0.31-20.31-2+deb13u10.31-30.32-10.33-1
None known
starlet
Debian:14
before 0.33-1, plus listed versions
0.31-20.31-30.32-1
0.33-1
starlet
Ubuntu:16.04:LTS
All versions, plus listed versions
0.25-10.26-10.28-1
None known
starlet
Ubuntu:18.04:LTS
All versions, plus listed versions
0.31-1
None known
starlet
Ubuntu:20.04:LTS
All versions, plus listed versions
0.31-1
None known
starlet
Ubuntu:22.04:LTS
All versions, plus listed versions
0.31-1.1
None known
starlet
Ubuntu:24.04:LTS
All versions, plus listed versions
0.31-2
None known
starlet
Ubuntu:26.10
All versions, plus listed versions
0.31-2build10.31-30.32-1
None known
starlet
Ubuntu:26.04:LTS
All versions, plus listed versions
0.31-20.31-2build1
None known

History

History
RecordedChangedSources
severityCVE List, OSV
affected, aliases, facts, referencesOSV
affected, factsOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-115865 is a high vulnerability (CVSS 7.5) in starlet, published October 30, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.38%, the 32nd percentile. Fixed in starlet 0.33-1.

References

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