- Exploited
- No known exploitation
- Fix
- Fixed in 0.30
- Who is exposed
- Not reported
Do first: Upgrade to a fixed version: 0.30.
- Last modified
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 0/100 · provisional
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Monoceros for Perl, before version 0.30, has a flaw in how it reads request bodies. A remote attacker can send a request declaring a very large Content-Length, which exhausts memory and crashes the worker process, forcing repeated restarts with small requests.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
Read the original description
Monoceros versions before 0.30 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.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure?/25Unknown. No advisory context yet
- Reach?/20Unknown. No tracked technology or package matched
- Severity?/10Unknown. No CVSS score or vendor rating
- No patch0/5No signal
What would change the score
- Would score about 55 if added to CISA KEV
- Would score about 50 if CISA's SSVC rates exploitation active
- Would score about 22 if advisories confirm default setups are exposed
What to do
Upgrade to a fixed version: 0.30.
Timeline
- CVE published
- First seen by cve.now1 day
- Record last updated
Affected versions
- Monoceros
fixed in 0.30
Evidence 3
- Patch
- Link
- Link
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-115864
Is CVE-2026-115864 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
Which versions are affected by CVE-2026-115864?
Monoceros: before 0.30.Source: cve.now feed data
How do I fix CVE-2026-115864?
Upgrade to a fixed version: 0.30.Source: cve.now feed data