How severe is CVE-2026-27169?

CVE-2026-27169 has a CVSS 3.x base score of 8.9, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability low.

Is CVE-2026-27169 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27169?

CVE-2026-27169 affects Opensift. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27169?

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-2026-27169 have an EU (EUVD) identifier?

Yes. CVE-2026-27169 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7746.

When was CVE-2026-27169 published?

CVE-2026-27169 was published on 2026-02-21 and last updated on 2026-06-17.

CVE-2026-27169

CVE-2026-27169 is a high-severity vulnerability in Opensift with a CVSS 3.x base score of 8.9. 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 8.9)
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7746
Weakness: CWE-79
Affected product: Opensift
Published: 2026-02-21
Last modified: 2026-06-17

Description

OpenSift is an AI study tool that sifts through large datasets using semantic search and generative AI. Versions 1.1.2-alpha and below render untrusted user/model content in chat tool UI surfaces using unsafe HTML interpolation patterns, leading to XSS. Stored content can execute JavaScript when later viewed in authenticated sessions. An attacker who can influence stored study/quiz/flashcard content could trigger script execution in a victim’s browser, potentially performing actions as that user in the local app session. This issue has been fixed in version 1.1.3-alpha.

Frequently asked questions

What is CVE-2026-27169?: OpenSift is an AI study tool that sifts through large datasets using semantic search and generative AI. Versions 1.1.2-alpha and below render untrusted user/model content in chat tool UI surfaces using unsafe HTML interpolation patterns, leading to XSS. Stored content can execute JavaScript when later viewed in authenticated sessions. An attacker who can influence stored study/quiz/flashcard content could trigger script execution in a victim’s browser, potentially performing actions as that user in the local app session. This issue has been fixed in version 1.1.3-alpha.
How severe is CVE-2026-27169?: CVE-2026-27169 has a CVSS 3.x base score of 8.9, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability low.
Is CVE-2026-27169 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27169?: CVE-2026-27169 affects Opensift. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27169?: 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-2026-27169 have an EU (EUVD) identifier?: Yes. CVE-2026-27169 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7746.
When was CVE-2026-27169 published?: CVE-2026-27169 was published on 2026-02-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:opensift:opensift:*:*:*:*:*:python:*:*

More vulnerabilities in Opensift

CVE-2026-28676 — High (CVSS 8.8): OpenSift is an AI study tool that sifts through large datasets using semantic search and generative AI. Prior to…
CVE-2026-28677 — High (CVSS 8.2): OpenSift is an AI study tool that sifts through large datasets using semantic search and generative AI. Prior to…
CVE-2026-27170 — High (CVSS 7.1): OpenSift is an AI study tool that sifts through large datasets using semantic search and generative AI. In versions…
CVE-2026-27189 — Medium (CVSS 6.6): OpenSift is an AI study tool that sifts through large datasets using semantic search and generative AI. Versions…
CVE-2026-28675 — Medium (CVSS 5.3): OpenSift is an AI study tool that sifts through large datasets using semantic search and generative AI. Prior to…

All CVEs affecting Opensift →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →