How severe is CVE-2026-21885?

CVE-2026-21885 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-21885 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-21885?

CVE-2026-21885 affects Miniflux Project Miniflux. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-21885?

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

Does CVE-2026-21885 have an EU (EUVD) identifier?

Yes. CVE-2026-21885 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1186.

When was CVE-2026-21885 published?

CVE-2026-21885 was published on 2026-01-08 and last updated on 2026-06-17.

CVE-2026-21885

CVE-2026-21885 is a medium-severity vulnerability in Miniflux Project Miniflux with a CVSS 3.x base score of 6.5. 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: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-1186
Weakness: CWE-918
Affected product: Miniflux Project Miniflux
Published: 2026-01-08
Last modified: 2026-06-17

Description

Miniflux 2 is an open source feed reader. Prior to version 2.2.16, Miniflux's media proxy endpoint (`GET /proxy/{encodedDigest}/{encodedURL}`) can be abused to perform Server-Side Request Forgery (SSRF). An authenticated user can cause Miniflux to generate a signed proxy URL for attacker-chosen media URLs embedded in feed entry content, including internal addresses (e.g., localhost, private RFC1918 ranges, or link-local metadata endpoints). Requesting the resulting `/proxy/...` URL makes Miniflux fetch and return the internal response. Version 2.2.16 fixes the issue.

Frequently asked questions

What is CVE-2026-21885?: Miniflux 2 is an open source feed reader. Prior to version 2.2.16, Miniflux's media proxy endpoint (`GET /proxy/{encodedDigest}/{encodedURL}`) can be abused to perform Server-Side Request Forgery (SSRF). An authenticated user can cause Miniflux to generate a signed proxy URL for attacker-chosen media URLs embedded in feed entry content, including internal addresses (e.g., localhost, private RFC1918 ranges, or link-local metadata endpoints). Requesting the resulting `/proxy/...` URL makes Miniflux fetch and return the internal response. Version 2.2.16 fixes the issue.
How severe is CVE-2026-21885?: CVE-2026-21885 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-21885 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21885?: CVE-2026-21885 affects Miniflux Project Miniflux. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-21885?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-21885 have an EU (EUVD) identifier?: Yes. CVE-2026-21885 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1186.
When was CVE-2026-21885 published?: CVE-2026-21885 was published on 2026-01-08 and last updated on 2026-06-17.

References

https://github.com/miniflux/v2/security/advisories/GHSA-xwh2-742g-w3wp

Affected products (1)

cpe:2.3:a:miniflux_project:miniflux:*:*:*:*:*:go:*:*

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