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CVE-2026-116128

Starlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodies

7.5 HighFix available

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.

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 from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodies

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.

Record
CVE-2026-116128
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-770
Updated
2026-11-06
EUVDEUVD-2026-113909 7.5

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.

Record
EUVD-2026-113909
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-jrjq-4h5w-6gv7 7.5

Starlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering...

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.

Record
GHSA-jrjq-4h5w-6gv7
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-770
Updated
2026-11-06
NVD 7.5

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.

Record
CVE-2026-116128
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-770
Updated
2026-11-06
OSV 7.5

Starlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodies

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.

Record
CVE-2026-116128
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-770
Updated
2026-11-07
OSVDEBIAN-CVE-2026-116128 7.5

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.

Record
DEBIAN-CVE-2026-116128
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-2026-116128 No score

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.

Record
UBUNTU-CVE-2026-116128
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-2026-116128 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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