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Vulnerabilities

Vulnerability · CVE-2026-114613

Missing Release of Memory after Effective Lifetime

Published Oct 22, 2026 · Red Hat Red Hat Enterprise Linux

Last checked Nov 5, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-114613. EPSS is 0.54%. Act only if a listed version of Red Hat Red Hat Enterprise Linux is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.54%
Remediation
Vendor / distro source
Affected products
package pip · pypi msgpack

The msgpack-python C extension (msgpack._cmsgpack) leaks a decoded map value when deserialization rejects a key with strict_map_key=True (the default). Repeated malformed inputs can cause unbounded process memory growth and denial of service in applications that deserialize attacker-controlled MessagePack data. Both unpackb() and the streaming Unpacker API are affected. The pure-Python fallback does not exhibit this leak in the reported tests. The report measured approximately 4 MiB retained per failed parse …

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • package pipversion unspecified
  • pypi msgpackversion unspecified

How to fix CVE-2026-114613

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-114613. EPSS is 0.54%. Act only if a listed version of Red Hat Red Hat Enterprise Linux is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-772: Missing Release of Resource after Effective Lifetime. EPSS 0.54%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 22, 2026 · Red Hat Security Data

    Detected

    msgpack: msgpack: Denial of Service via memory leak during map deserialization

Sources

  • CVE.orgVulnerability recordCVE-2026-114613

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-114613

    30-day exploitation probability 0.54%

    first.org
  • GitLab Advisory DatabasePackage advisoryCVE-2026-114613

    The msgpack-python C extension (msgpack._cmsgpack) leaks a decoded map value when deserialization rejects a key with strict_map_key=True (the default). Repeated malformed inputs can cause unbounded process memory growth and denial of service in applications that deserialize attacker-controlled MessagePack data. Both unpackb() and the streaming Unpacker API are affected. The pure-Python fallback do

    advisories.gitlab.com
  • Red Hat Security DataVendor advisoryCVE-2026-114613

    msgpack: msgpack: Denial of Service via memory leak during map deserialization

    access.redhat.com
  • Snyk Vulnerability DatabasePackage advisorySNYK-PYTHON-MSGPACK-21433567

    Missing Release of Memory after Effective Lifetime

    security.snyk.io

Freshness

Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 5, 2026
  • GitLab Advisory DatabaseOct 28, 2026
  • Snyk Vulnerability DatabaseOct 25, 2026
  • CVE.orgOct 23, 2026
  • Red Hat Security DataOct 23, 2026