How severe is CVE-2026-27627?

CVE-2026-27627 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2026-27627 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27627?

CVE-2026-27627 affects Localhostlabs Karakeep. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27627?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-27627 have an EU (EUVD) identifier?

Yes. CVE-2026-27627 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8614.

When was CVE-2026-27627 published?

CVE-2026-27627 was published on 2026-02-25 and last updated on 2026-06-17.

CVE-2026-27627

CVE-2026-27627 is a high-severity vulnerability in Localhostlabs Karakeep with a CVSS 3.x base score of 8.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: High (CVSS 3.x base score 8.2)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8614
Weakness: CWE-79
Affected product: Localhostlabs Karakeep
Published: 2026-02-25
Last modified: 2026-06-17

Description

Karakeep is a elf-hostable bookmark-everything app. In version 0.30.0, when the Reddit metascraper plugin returns `readableContentHtml`, the HTML parsing subprocess uses it directly without running it through DOMPurify. Every other content source in the crawler goes through Readability + DOMPurify, but the Reddit path skips both. Since this content ends up in `dangerouslySetInnerHTML` in the reader view, any malicious HTML in the Reddit response gets executed in the user's browser. Version 0.31.0 contains a patch for this issue.

Frequently asked questions

What is CVE-2026-27627?: Karakeep is a elf-hostable bookmark-everything app. In version 0.30.0, when the Reddit metascraper plugin returns `readableContentHtml`, the HTML parsing subprocess uses it directly without running it through DOMPurify. Every other content source in the crawler goes through Readability + DOMPurify, but the Reddit path skips both. Since this content ends up in `dangerouslySetInnerHTML` in the reader view, any malicious HTML in the Reddit response gets executed in the user's browser. Version 0.31.0 contains a patch for this issue.
How severe is CVE-2026-27627?: CVE-2026-27627 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2026-27627 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27627?: CVE-2026-27627 affects Localhostlabs Karakeep. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27627?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-27627 have an EU (EUVD) identifier?: Yes. CVE-2026-27627 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8614.
When was CVE-2026-27627 published?: CVE-2026-27627 was published on 2026-02-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:localhostlabs:karakeep:0.30.0:*:*:*:*:-:*:*

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