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
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
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 High
CVSS: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 High
CVSS: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 High
CVSS: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 High
CVSS: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 High
CVSS: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 High
CVSS: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
| Package | Affected | Fixed |
|---|---|---|
starletDebian:12 |
All versions, plus listed versions 0.31-20.31-30.32-10.33-1 |
None known |
starletDebian:13 |
All versions, plus listed versions 0.31-20.31-2+deb13u10.31-30.32-10.33-1 |
None known |
starletDebian:14 |
before 0.33-1, plus listed versions 0.31-20.31-30.32-1 |
0.33-1 |
starletUbuntu:16.04:LTS |
All versions, plus listed versions 0.25-10.26-10.28-1 |
None known |
starletUbuntu:18.04:LTS |
All versions, plus listed versions 0.31-1 |
None known |
starletUbuntu:20.04:LTS |
All versions, plus listed versions 0.31-1 |
None known |
starletUbuntu:22.04:LTS |
All versions, plus listed versions 0.31-1.1 |
None known |
starletUbuntu:24.04:LTS |
All versions, plus listed versions 0.31-2 |
None known |
starletUbuntu:26.10 |
All versions, plus listed versions 0.31-2build10.31-30.32-1 |
None known |
starletUbuntu:26.04:LTS |
All versions, plus listed versions 0.31-20.31-2build1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| severity | CVE List, OSV | |
| affected, aliases, facts, references | OSV | |
| affected, facts | OSV | |
| first indexed | CVE 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
github.com/kazuho/Starlet/commit/598947ac620fd31b390335c683d79fa244770782.patch
metacpan.org/release/KAZUHO/Starlet-0.33/changes
nvd.nist.gov/vuln/detail/CVE-2026-115865
github.com/advisories/GHSA-xfc8-r6h3-qmmm
cpan.org/modules
github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115865.json