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Vulnerability details: VCID-mfkw-vtvw-bqas
Vulnerability ID VCID-mfkw-vtvw-bqas
Aliases CVE-2026-44458
GHSA-qp7p-654g-cw7p
Summary Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.18, the JSX renderer escapes style attribute object values for HTML but not for CSS. Untrusted input in a style object value or property name can therefore inject additional CSS declarations into the rendered style attribute. The impact is limited to CSS and does not allow JavaScript execution or HTML attribute breakout. This vulnerability is fixed in 4.12.18.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-116 Improper Encoding or Escaping of Output
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 0.00043 https://api.first.org/data/v1/epss?cve=CVE-2026-44458
epss 0.00043 https://api.first.org/data/v1/epss?cve=CVE-2026-44458
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-qp7p-654g-cw7p
cvssv3.1 4.3 https://github.com/honojs/hono
generic_textual MODERATE https://github.com/honojs/hono
cvssv3.1 4.3 https://github.com/honojs/hono/security/advisories/GHSA-qp7p-654g-cw7p
cvssv3.1_qr MODERATE https://github.com/honojs/hono/security/advisories/GHSA-qp7p-654g-cw7p
generic_textual MODERATE https://github.com/honojs/hono/security/advisories/GHSA-qp7p-654g-cw7p
ssvc Track https://github.com/honojs/hono/security/advisories/GHSA-qp7p-654g-cw7p
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-44458
https://github.com/honojs/hono
CVE-2026-44458 https://nvd.nist.gov/vuln/detail/CVE-2026-44458
GHSA-qp7p-654g-cw7p https://github.com/advisories/GHSA-qp7p-654g-cw7p
GHSA-qp7p-654g-cw7p https://github.com/honojs/hono/security/advisories/GHSA-qp7p-654g-cw7p
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N Found at https://github.com/honojs/hono
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:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N Found at https://github.com/honojs/hono/security/advisories/GHSA-qp7p-654g-cw7p
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:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-05-14T16:00:00Z/ Found at https://github.com/honojs/hono/security/advisories/GHSA-qp7p-654g-cw7p
Exploit Prediction Scoring System (EPSS)
Percentile 0.13407
EPSS Score 0.00043
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:42:35.172855+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/44xxx/CVE-2026-44458.json 38.6.0