How severe is CVE-2026-28677?

CVE-2026-28677 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 no user interaction. Impact on confidentiality is high, integrity none, and availability low.

Is CVE-2026-28677 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28677?

CVE-2026-28677 affects Opensift. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28677?

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-2026-28677 have an EU (EUVD) identifier?

Yes. CVE-2026-28677 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9988.

When was CVE-2026-28677 published?

CVE-2026-28677 was published on 2026-03-06 and last updated on 2026-06-17.

CVE-2026-28677

CVE-2026-28677 is a high-severity vulnerability in Opensift 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-918.

Key facts

Severity: High (CVSS 3.x base score 8.2)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9988
Weakness: CWE-918
Affected product: Opensift
Published: 2026-03-06
Last modified: 2026-06-17

Description

OpenSift is an AI study tool that sifts through large datasets using semantic search and generative AI. Prior to version 1.6.3-alpha, the URL ingest pipeline accepted user-controlled remote URLs with incomplete destination restrictions. Although private/local host checks existed, missing restrictions for credentialed URLs, non-standard ports, and cross-host redirects left SSRF-class abuse paths in non-localhost deployments. This issue has been patched in version 1.6.3-alpha.

Frequently asked questions

What is CVE-2026-28677?: OpenSift is an AI study tool that sifts through large datasets using semantic search and generative AI. Prior to version 1.6.3-alpha, the URL ingest pipeline accepted user-controlled remote URLs with incomplete destination restrictions. Although private/local host checks existed, missing restrictions for credentialed URLs, non-standard ports, and cross-host redirects left SSRF-class abuse paths in non-localhost deployments. This issue has been patched in version 1.6.3-alpha.
How severe is CVE-2026-28677?: CVE-2026-28677 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 no user interaction. Impact on confidentiality is high, integrity none, and availability low.
Is CVE-2026-28677 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28677?: CVE-2026-28677 affects Opensift. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28677?: 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-2026-28677 have an EU (EUVD) identifier?: Yes. CVE-2026-28677 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9988.
When was CVE-2026-28677 published?: CVE-2026-28677 was published on 2026-03-06 and last updated on 2026-06-17.

References

Affected products (1)

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

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