CVE-2026-21885: Miniflux 2 is an open source feed reader

Routine

MEDIUM 6.5UPGRADE

CVE-2026-21885 is a medium-severity flaw (CVSS 6.5) affecting miniflux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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). Reque

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-01-08
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: miniflux project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-08 14:15 UTCPublished CVE record published
2026-06-17 10:19 UTCUpdated Record last modified

miniflux project miniflux UPGRADE

Affected: >= 2.0.0 and < 2.2.16

Fixed in: 2.2.16

Safe to downgrade to: a release before 2.0.0

1. Check installed version

apt-cache policy miniflux || rpm -q miniflux || miniflux --version

2. UPGRADE to 2.2.16 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade miniflux

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade miniflux

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.0.0 (Debian / Ubuntu)

apt-cache madison miniflux sudo apt install miniflux=<VERSION_BEFORE_2.0.0> sudo apt-mark hold miniflux

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list miniflux sudo dnf downgrade miniflux-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add miniflux

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-21885?

miniflux: upgrade to 2.2.16. Exact commands for each OS are on this page.

Is CVE-2026-21885 being exploited?

CVE-2026-21885 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-21885 affect?

CVE-2026-21885 affects miniflux. Severity is medium (CVSS 6.5). 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 Mini

How urgent is CVE-2026-21885?

Priority 33/100. Public exploit reference

References

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