Is there a public exploit for CVE-2026-117645?

No public exploit for CVE-2026-117645 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-117645?

CVE-2026-117645 scores CVSS 5.3 (v4.0), rated medium.

5.3 Medium

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in phoenixframework phoenixhtml allows…

CVE-2026-117645

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in phoenixframework phoenixhtml allows an attacker who controls attribute names to inject attributes and script into rendered HTML via Phoenix.HTML.attributesescape/1. attributesescape/1 in lib/phoenixhtml.ex escapes attribute values but not attribute names. keyescape/1 passes a binary key through htmlescape, which neutralizes quotes and angle brackets but not whitespace, so a key such as x onmouseover ends the attribute and starts a new one. An atom key is only dasherized, so any character passes, including quotes and >. Nested data, aria and phx keys take the same paths. An application is affected when it builds attribute keys from untrusted input and renders them through HEEx , contenttag/3, or a direct call. Before 3.0.0 the same code lived in Phoenix.HTML.Tag. This issue affects phoenixhtml: from 1.0.0 before 3.3.5 and from 4.0.0 before 4.4.0.

Assessment

CVSS: 5.3 (v4.0)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 30 October 2026
Last updated: 6 November 2026
Weakness: CWE-79
Assigner: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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