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Vulnerabilities

Vulnerability · CVE-2026-114605

Uncontrolled Recursion

Published Oct 22, 2026 · catalog updated Oct 29, 2026 · Red Hat Red Hat Enterprise Linux

Last checked Nov 3, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-114605. EPSS is 0.47%. Act only if a listed version of Red Hat Red Hat Enterprise Linux is installed.

Gaps on 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
0.47%
Remediation
Version ranges on file
Affected products
package pip · pip dnspython · pypi dnspython

### Impact A maliciously crafted DNS message may cause dns.name.from_wire_parser() to use excessive CPU for DNS name decompression. Applications that process untrusted DNS wire form messages with dnspython may be degraded or DoS'd by the extra CPU use required. ### Patches This problem is fixed in dnspython 2.9.0. ### Workarounds There are no known workarounds. ### Credit Evgenios Gkritsis, Department of Informatics, University of Piraeus & Athena Research Center, Greece Constantinos Patsakis, Department of Informatics, University of Piraeus & Athena Research Center, Greece George Stergiopoulos, Department of Informatics, Athens University of Economics and Business, Greece

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
  • pip dnspython< 2.9.0
  • pypi dnspythonversion unspecified

How to fix CVE-2026-114605

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-2026-114605. EPSS is 0.47%. Act only if a listed version of Red Hat Red Hat Enterprise Linux is installed.

Which versions are affected?

Compare what you have installed with < 2.9.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-606; CWE-674. EPSS 0.47%. 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

    dnspython: dnspython: Denial of Service via excessive DNS compression pointer traversal

  2. Oct 27, 2026 · GitHub Advisory Database

    Updated

    ### Impact A maliciously crafted DNS message may cause dns.name.from_wire_parser() to use excessive CPU for DNS name decompression. Applications that process untrusted DNS wire form messages with dnspython may be degraded or DoS'd by the extra CPU use required. ### Patches This problem is fixed in dnspython 2.9.0. ### Workarounds There are no known workarounds. ### Credit Evgenios Gkritsis, Depart

  3. Oct 29, 2026 · NIST NVD

    Updated

    dnspython is a DNS toolkit for Python. Prior to 2.9.0, dns.name.from_wire_parser follows attacker-controlled DNS compression pointer chains without a hop limit. A malicious DNS wire-format message can force excessive pointer traversal during name decompression, causing high CPU use, application degradation, or denial of service in applications that process untrusted DNS messages. This issue is fix

Sources

  • CVE.orgVulnerability recordCVE-2026-114605

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-114605

    30-day exploitation probability 0.47%

    first.org
  • GitHub Advisory DatabasePackage advisoryGHSA-45c3-73f7-pv4m

    dnspython dns.name.from_wire_parser() excessive CPU use

    github.com
  • GitLab Advisory DatabasePackage advisoryCVE-2026-114605

    A maliciously crafted DNS message may cause dns.name.from_wire_parser() to use excessive CPU for DNS name decompression. Applications that process untrusted DNS wire form messages with dnspython may be degraded or DoS'd by the extra CPU use required.

    advisories.gitlab.com
  • NIST NVDVulnerability recordCVE-2026-114605

    dnspython is a DNS toolkit for Python. Prior to 2.9.0, dns.name.from_wire_parser follows attacker-controlled DNS compression pointer chains without a hop limit. A malicious DNS wire-format message can force excessive pointer traversal during name decompression, causing high CPU u

    nvd.nist.gov
  • Red Hat Security DataVendor advisoryCVE-2026-114605

    dnspython: dnspython: Denial of Service via excessive DNS compression pointer traversal

    access.redhat.com
  • Snyk Vulnerability DatabasePackage advisorySNYK-PYTHON-DNSPYTHON-21433565

    Uncontrolled Recursion

    security.snyk.io

References

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 3, 2026
  • NIST NVDOct 29, 2026
  • GitLab Advisory DatabaseOct 28, 2026
  • GitHub Advisory DatabaseOct 28, 2026
  • Snyk Vulnerability DatabaseOct 25, 2026
  • Red Hat Security DataOct 23, 2026
  • CVE.orgOct 23, 2026