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Vulnerability details: VCID-q6tz-gweh-ekdd
Vulnerability ID VCID-q6tz-gweh-ekdd
Aliases CVE-2021-41078
GHSA-6p52-jr3q-c94g
PYSEC-2021-383
Summary Nameko through 2.13.0 can be tricked into performing arbitrary code execution when deserializing the config file.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-502 Deserialization of Untrusted Data
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.01473 https://api.first.org/data/v1/epss?cve=CVE-2021-41078
epss 0.01473 https://api.first.org/data/v1/epss?cve=CVE-2021-41078
epss 0.01473 https://api.first.org/data/v1/epss?cve=CVE-2021-41078
epss 0.01473 https://api.first.org/data/v1/epss?cve=CVE-2021-41078
cvssv3.1_qr CRITICAL https://github.com/advisories/GHSA-6p52-jr3q-c94g
cvssv3.1 8.6 https://github.com/nameko/nameko
cvssv4 9.3 https://github.com/nameko/nameko
generic_textual CRITICAL https://github.com/nameko/nameko
cvssv3.1 8.6 https://github.com/nameko/nameko/releases/tag/v2.14.0
cvssv4 9.3 https://github.com/nameko/nameko/releases/tag/v2.14.0
generic_textual CRITICAL https://github.com/nameko/nameko/releases/tag/v2.14.0
cvssv3.1 8.6 https://github.com/nameko/nameko/releases/tag/v3.0.0-rc10
cvssv4 9.3 https://github.com/nameko/nameko/releases/tag/v3.0.0-rc10
generic_textual CRITICAL https://github.com/nameko/nameko/releases/tag/v3.0.0-rc10
cvssv3.1 8.6 https://github.com/nameko/nameko/security/advisories/GHSA-6p52-jr3q-c94g
cvssv3.1_qr CRITICAL https://github.com/nameko/nameko/security/advisories/GHSA-6p52-jr3q-c94g
cvssv4 9.3 https://github.com/nameko/nameko/security/advisories/GHSA-6p52-jr3q-c94g
generic_textual CRITICAL https://github.com/nameko/nameko/security/advisories/GHSA-6p52-jr3q-c94g
cvssv3.1 8.6 https://github.com/pypa/advisory-database/tree/main/vulns/nameko/PYSEC-2021-383.yaml
cvssv4 9.3 https://github.com/pypa/advisory-database/tree/main/vulns/nameko/PYSEC-2021-383.yaml
generic_textual CRITICAL https://github.com/pypa/advisory-database/tree/main/vulns/nameko/PYSEC-2021-383.yaml
cvssv3.1 8.6 https://nvd.nist.gov/vuln/detail/CVE-2021-41078
cvssv4 9.3 https://nvd.nist.gov/vuln/detail/CVE-2021-41078
generic_textual CRITICAL https://nvd.nist.gov/vuln/detail/CVE-2021-41078
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-41078
https://github.com/nameko/nameko
https://github.com/nameko/nameko/releases/tag/v2.14.0
https://github.com/nameko/nameko/releases/tag/v3.0.0-rc10
https://github.com/nameko/nameko/security/advisories/GHSA-6p52-jr3q-c94g
https://github.com/pypa/advisory-database/tree/main/vulns/nameko/PYSEC-2021-383.yaml
CVE-2021-41078 https://nvd.nist.gov/vuln/detail/CVE-2021-41078
GHSA-6p52-jr3q-c94g https://github.com/advisories/GHSA-6p52-jr3q-c94g
No exploits are available.
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Found at https://github.com/nameko/nameko
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H Found at https://github.com/nameko/nameko
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Found at https://github.com/nameko/nameko/releases/tag/v2.14.0
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H Found at https://github.com/nameko/nameko/releases/tag/v2.14.0
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Found at https://github.com/nameko/nameko/releases/tag/v3.0.0-rc10
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H Found at https://github.com/nameko/nameko/releases/tag/v3.0.0-rc10
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Found at https://github.com/nameko/nameko/security/advisories/GHSA-6p52-jr3q-c94g
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H Found at https://github.com/nameko/nameko/security/advisories/GHSA-6p52-jr3q-c94g
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Found at https://github.com/pypa/advisory-database/tree/main/vulns/nameko/PYSEC-2021-383.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H Found at https://github.com/pypa/advisory-database/tree/main/vulns/nameko/PYSEC-2021-383.yaml
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-41078
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-41078
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.81279
EPSS Score 0.01473
Published At June 4, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-02T04:14:52.824954+00:00 Pypa Importer Import https://github.com/pypa/advisory-database/blob/main/vulns/nameko/PYSEC-2021-383.yaml 38.6.0