CVE-2018-14505

Mitmweb in mitmproxy allows DNS Rebinding attacks

8.8 HighFix available

mitmweb in mitmproxy v4.0.3 allows DNS Rebinding attacks, related to tools/web/app.py.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

3.35%Up 2.7 points since Apr 14, 2021

What each source reports

NVD Score used 8.8

mitmweb in mitmproxy v4.0.3 allows DNS Rebinding attacks, related to tools/web/app.py.

Record: CVE-2018-14505
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0: 6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness: CWE-20
Updated: 2026-11-02

CVE List No score

mitmweb in mitmproxy v4.0.3 allows DNS Rebinding attacks, related to tools/web/app.py.

Record: CVE-2018-14505
Updated: 2026-11-02

EUVDEUVD-2018-0100 No score

mitmweb in mitmproxy v4.0.3 allows DNS Rebinding attacks, related to tools/web/app.py.

Record: EUVD-2018-0100
Updated: 2026-11-03

GitHub AdvisoriesGHSA-6m53-c78q-7qmg 9.2

Mitmweb in mitmproxy allows DNS Rebinding attacks

mitmweb in mitmproxy before v4.0.4 allows DNS Rebinding attacks, related to tools/web/app.py.

Record: GHSA-6m53-c78q-7qmg
CVSS 4.0: 9.2 CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-20
Updated: 2026-11-02

OSV 8.8

mitmweb in mitmproxy v4.0.3 allows DNS Rebinding attacks, related to tools/web/app.py.

Record: CVE-2018-14505
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2018-14505 8.8

mitmweb in mitmproxy v4.0.3 allows DNS Rebinding attacks, related to tools/web/app.py.

Record: DEBIAN-CVE-2018-14505
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-6m53-c78q-7qmg 9.2

Mitmweb in mitmproxy allows DNS Rebinding attacks

mitmweb in mitmproxy before v4.0.4 allows DNS Rebinding attacks, related to tools/web/app.py.

Record: GHSA-6m53-c78q-7qmg
CVSS 4.0: 9.2 CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-20
Updated: 2026-11-02

OSVUBUNTU-CVE-2018-14505 8.8

mitmweb in mitmproxy v4.0.3 allows DNS Rebinding attacks, related to tools/web/app.py.

Record: UBUNTU-CVE-2018-14505
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVPYSEC-2018-56 No score

mitmweb in mitmproxy v4.0.3 allows DNS Rebinding attacks, related to tools/web/app.py.

Record: PYSEC-2018-56
Updated: 2026-11-02

Affected products

mitmproxy

Affected packages

Affected packages
Package	Affected	Fixed
`mitmproxy` PyPI	before 4.0.4	4.0.4
`mitmproxy` Debian:12	before 3.0.4-1	3.0.4-1
`mitmproxy` Debian:14	before 3.0.4-1, plus listed versions 0.10-10.10-20.10.1-10.10.1-20.11.3-1 Show 30 moreShow less 0.11.3-20.11.3-30.12.1-10.12.1-20.13-10.15-10.15-20.18.1-10.18.1-20.18.2-10.18.2-20.18.2-30.18.2-40.18.2-50.18.2-60.6-10.6-20.6-30.7-10.8-10.8-20.9.1-10.9.1-20.9.2-10.9.2-22.0.2-12.0.2-22.0.2-32.0.2-43.0.3-1	3.0.4-1
`mitmproxy` PyPI	before 4.0.4, plus listed versions 0.100.10.10.110.11.10.11.2 Show 30 moreShow less 0.11.30.12.00.12.10.130.14.00.150.160.170.18.10.18.20.18.30.80.8.10.90.9.10.9.21.0.01.0.11.0.22.0.02.0.12.0.23.0.03.0.13.0.23.0.33.0.44.0.04.0.14.0.3	4.0.4
`mitmproxy` Ubuntu:16.04:LTS	All versions, plus listed versions 0.11.3-30.12.1-20.13-10.15-1	None known
`mitmproxy` Ubuntu:18.04:LTS	All versions, plus listed versions 2.0.2-22.0.2-3	None known
`mitmproxy` Ubuntu:20.04:LTS	All versions, plus listed versions 4.0.4-64.0.4-6.1	None known
`mitmproxy` Ubuntu:22.04:LTS	All versions, plus listed versions 6.0.2-1	None known
`mitmproxy` Ubuntu:24.04:LTS	All versions, plus listed versions 8.1.1-2	None known
`mitmproxy` Ubuntu:25.10	All versions, plus listed versions 8.1.1-28.1.1-3	None known
`mitmproxy` Ubuntu:26.10	All versions, plus listed versions 8.1.1-4	None known
`mitmproxy` Ubuntu:26.04:LTS	All versions, plus listed versions 8.1.1-38.1.1-4	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-14505 is a high vulnerability (CVSS 8.8) in Mitmproxy, published July 22, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.35%, the 88th percentile. Fixed in mitmproxy 4.0.4.

References

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