PatchTheCVECVE-2026-117645: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in phoenixf
CVE-2026-117645 is a medium-severity flaw (CVSS 5.3) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in phoenixframework phoenix_html allows an attacker who controls attribute names to inject attributes and script into rendered HTML via Phoenix.HTML.attributes_escape/1. attributes_escape/1 in lib/phoenix_html.ex escapes attribute values but not attribute names. key_escape/1 passes a binary key through html_escape, which neutralizes quotes and angl
Why this priority
- No elevated risk signals yet
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Passive |
| EPSS exploit chance | n/a |
| CISA exploited list | No |
| Weakness | CWE-79 |
| Published | 2026-10-30 |
| Last modified | 2026-10-30 |
Last updated 2026-10-30 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Timeline
- Published CVE record published
- Updated Record last modified
Advisories and coverage
Research and news
- VulDB Recent Entries: CVE-2026-117645 | phoenixframework phoenix_html up to 3.3.4/4.0.0/4.3.9 Attribute Escaping lib/phoenix_html.ex Phoenix.HTML.attributes_escap 2026-10-30
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-117645?
No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.
Is CVE-2026-117645 being exploited?
CVE-2026-117645 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-117645 affect?
CVE-2026-117645 affects affected software. Severity is medium (CVSS 5.3). Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in phoenixframework phoenix_html allows an attacker who controls attribute names to inject attributes and script into rendered HTML via Phoen
How urgent is CVE-2026-117645?
Priority 19/100. No elevated risk signals yet.