CVE-2026-115865: Starlet versions before 0.33 for Perl allow a request declaring a large Content-Length to kill a
Affects starletSource GCVE Database
Not known to be exploited.
Data as of 5 Nov 2026, 12:35 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 30 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10starletpkg:deb/ubuntu/starlet?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSstarletpkg:deb/ubuntu/starlet?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSstarletpkg:deb/ubuntu/starlet?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 22.04 LTSstarletpkg:deb/ubuntu/starlet?arch=source&distro=jammyOther threats | Affected
| Fixed in– |
Ubuntu 20.04 LTSstarletpkg:deb/ubuntu/starlet?arch=source&distro=focalOther threats | Affected
| Fixed in– |
Ubuntu 18.04 LTSstarletpkg:deb/ubuntu/starlet?arch=source&distro=bionicOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
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.
References
- ubuntu.com/security/CVE-2026-115865 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-115865 (opens in a new tab)
- lists.security.metacpan.org/cve-announce/msg/44760439/ (opens in a new tab)
- github.com/kazuho/Starlet/commit/598947ac620fd31b390335c683d79fa244770782.patch (opens in a new tab)
- metacpan.org/release/KAZUHO/Starlet-0.33/changes (opens in a new tab)