How severe is CVE-2026-30857?

CVE-2026-30857 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-30857 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-30857?

CVE-2026-30857 affects Tencent Weknora. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-30857?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-30857 have an EU (EUVD) identifier?

Yes. CVE-2026-30857 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10180.

When was CVE-2026-30857 published?

CVE-2026-30857 was published on 2026-03-07 and last updated on 2026-06-17.

CVE-2026-30857

CVE-2026-30857 is a medium-severity vulnerability in Tencent Weknora with a CVSS 3.x base score of 5.3. 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-639.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10180
Weakness: CWE-639
Affected product: Tencent Weknora
Published: 2026-03-07
Last modified: 2026-06-17

Description

WeKnora is an LLM-powered framework designed for deep document understanding and semantic retrieval. Prior to version 0.3.0, a cross-tenant authorization bypass in the knowledge base copy endpoint allows any authenticated user to clone (duplicate) another tenant’s knowledge base into their own tenant by knowing/guessing the source knowledge base ID. This enables bulk data exfiltration (document/FAQ content) across tenants. This issue has been patched in version 0.3.0.

Frequently asked questions

What is CVE-2026-30857?: WeKnora is an LLM-powered framework designed for deep document understanding and semantic retrieval. Prior to version 0.3.0, a cross-tenant authorization bypass in the knowledge base copy endpoint allows any authenticated user to clone (duplicate) another tenant’s knowledge base into their own tenant by knowing/guessing the source knowledge base ID. This enables bulk data exfiltration (document/FAQ content) across tenants. This issue has been patched in version 0.3.0.
How severe is CVE-2026-30857?: CVE-2026-30857 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-30857 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-30857?: CVE-2026-30857 affects Tencent Weknora. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-30857?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-30857 have an EU (EUVD) identifier?: Yes. CVE-2026-30857 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10180.
When was CVE-2026-30857 published?: CVE-2026-30857 was published on 2026-03-07 and last updated on 2026-06-17.

References

https://github.com/Tencent/WeKnora/security/advisories/GHSA-8rf9-c59g-f82f

Affected products (1)

cpe:2.3:a:tencent:weknora:*:*:*:*:*:*:*:*

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