CVE-2026-68747Network attack vector

CSS injection via uninspected at-rule input

Published Aug 6, 2026 · Updated Aug 6, 2026

CSS injection in html_sanitize_ex 0.3.1 through 1.4.4 and 1.5.0-rc.0 through 1.5.3 allows remote attackers to inject at-rules. HtmlSanitizeEx.Scrubber.CSS.scrub/1 allowlists only property-value matches, copying unmatched at-rules such as @import unchanged. No authentication is required, but exploitation requires html5/1, a matching custom scrubber, or direct scrub/1 use and rendering the result to other users; content stays within style elements and cannot execute script.

CVSS severity2.3
Low
EPSS probability0.25%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSS injection in html_sanitize_ex 0.3.1 through 1.4.4 and 1.5.0-rc.0 through 1.5.3 allows remote attackers to inject at-rules. HtmlSanitizeEx.Scrubber.CSS.scrub/1 allowlists only property-value matches, copying unmatched at-rules such as @import unchanged. No authentication is required, but exploitation requires html5/1, a matching custom scrubber, or direct scrub/1 use and rendering the result to other users; content stays within style elements and cannot execute script.

The record

CVE
CVE-2026-68747
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
René Föhring
Product
html_sanitize_ex
Classifications
CWE-74, CAPEC-148, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.3.1 <1.5.4
  2. Affected versionversion=21f90012eb21aa36f4e3701b7547e12faf0f3c8b <0b9f9ad63a7529d4f2c3c1134c371adc3e654308

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

René Föhring · html_sanitize_exversion=0.3.1 <1.5.4; version=21f90012eb21aa36f4e3701b7547e12faf0f3c8b <0b9f9ad63a7529d4f2c3c1134c371adc3e654308

Published CVSS scores

2.3Erlang Ecosystem FoundationCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CAPEC-148Content Spoofing
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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