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CVE-2026-75838VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Affects Red HatSource GCVE Database

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Authoritative record:CVE-2026-75838· Medium 5.1

Not known to be exploited · CVSS 5.1 Medium : upgrade Red Hat dompurify to 3.4.13 when convenient.

Data as of 29 Oct 2026, 18:38 UTC

CVSS 4.0 base score
5.1Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 33% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 3.4.13
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade DOMPurify and dompurify to 3.4.13.

Affected software

ProductAffectedFixed in
cure53DOMPurifyAffected
  • <3.4.13
Fixed in
  • 3.4.13
npmdompurifypkg:npm/dompurifyOther threatsAffected
  • <3.4.13
Fixed in
  • 3.4.13

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released updated grafana12.4 RPMs (version 12.4.10-0.7.hum1) that fix this vulnerability. Users should apply these updates to remediate the issue. Additionally, to mitigate the vulnerability, avoid using DOMPurify with custom IN_PLACE sanitization configurations that include element-removal hooks. Default DOMPurify configurations are not affected and require no action.

Description

A cross-site scripting (XSS) vulnerability (CVE-2026-75838) was found in the DOMPurify library used by Red Hat Hardened Images RPMs, specifically in the grafana12.4 package. The flaw occurs during IN_PLACE sanitization when element-removal hooks fail to neutralize detached subtrees, allowing remote attackers to execute arbitrary JavaScript by supplying crafted HTML with event handlers. This vulnerability requires a non-default DOMPurify configuration with an element-removal hook and user interaction with malicious content. The issue is fixed in the updated grafana12.4-12.4.10-0.7.hum1 RPMs provided by Red Hat. Users are advised to avoid using DOMPurify with custom IN_PLACE sanitization configurations that include element-removal hooks. Default configurations are not affected.

References

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