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Vulnerability details: VCID-s8ex-dtq7-qbdk
Vulnerability ID VCID-s8ex-dtq7-qbdk
Aliases CVE-2023-51774
GHSA-c8v6-786g-vjx6
Summary The json-jwt (aka JSON::JWT) gem 1.16.3 for Ruby sometimes allows bypass of identity checks via a sign/encryption confusion attack. For example, JWE can sometimes be used to bypass JSON::JWT.decode.
Status Published
Exploitability 0.5
Weighted Severity 7.6
Risk 3.8
Affected and Fixed Packages Package Details
Weaknesses (2)
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
cvssv3 6.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-51774.json
epss 0.00011 https://api.first.org/data/v1/epss?cve=CVE-2023-51774
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-c8v6-786g-vjx6
generic_textual MODERATE https://github.com/nov/json-jwt
generic_textual MODERATE https://github.com/nov/json-jwt/commit/593ea8bcaf2629048bad8c036191f2da0a2e713c
generic_textual MODERATE https://github.com/nov/json-jwt/commit/9c4d842a9465bd7960570ca326c3de79b4abc9d0
generic_textual MODERATE https://github.com/nov/json-jwt/issues/120
generic_textual MODERATE https://github.com/nov/json-jwt/issues/121
cvssv3.1 8.4 https://github.com/P3ngu1nW/CVE_Request/blob/main/novjson-jwt.md
generic_textual MODERATE https://github.com/P3ngu1nW/CVE_Request/blob/main/novjson-jwt.md
ssvc Track* https://github.com/P3ngu1nW/CVE_Request/blob/main/novjson-jwt.md
generic_textual MODERATE https://github.com/rubysec/ruby-advisory-db/blob/master/gems/json-jwt/CVE-2023-51774.yml
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2023-51774
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-51774.json
https://api.first.org/data/v1/epss?cve=CVE-2023-51774
https://github.com/nov/json-jwt
https://github.com/nov/json-jwt/commit/593ea8bcaf2629048bad8c036191f2da0a2e713c
https://github.com/nov/json-jwt/commit/9c4d842a9465bd7960570ca326c3de79b4abc9d0
https://github.com/nov/json-jwt/issues/120
https://github.com/nov/json-jwt/issues/121
2266922 https://bugzilla.redhat.com/show_bug.cgi?id=2266922
CVE-2023-51774 https://nvd.nist.gov/vuln/detail/CVE-2023-51774
CVE-2023-51774.YML https://github.com/rubysec/ruby-advisory-db/blob/master/gems/json-jwt/CVE-2023-51774.yml
GHSA-c8v6-786g-vjx6 https://github.com/advisories/GHSA-c8v6-786g-vjx6
novjson-jwt.md https://github.com/P3ngu1nW/CVE_Request/blob/main/novjson-jwt.md
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-51774.json
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:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/P3ngu1nW/CVE_Request/blob/main/novjson-jwt.md
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: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-08-26T20:08:13Z/ Found at https://github.com/P3ngu1nW/CVE_Request/blob/main/novjson-jwt.md
Exploit Prediction Scoring System (EPSS)
Percentile 0.01399
EPSS Score 0.00011
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T17:20:41.219453+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2023/51xxx/CVE-2023-51774.json 38.6.0