CVE-2026-22712: Improper Encoding or Escaping of Output due to magic word replacement in ParserAfterTidy vulnerability in The

Routine

MEDIUM 4.3DOWNGRADE

CVE-2026-22712 is a medium-severity flaw (CVSS 4.3) affecting approved revs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper Encoding or Escaping of Output due to magic word replacement in ParserAfterTidy vulnerability in The Wikimedia Foundation Mediawiki - ApprovedRevs Extension allows Input Data Manipulation.This issue affects Mediawiki - ApprovedRevs Extension: 1.45, 1.44, 1.43, 1.39.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 85%)
CISA exploited list	No
Weakness	CWE-116
Published	2026-01-09
Last modified	2026-06-17

Publisher (CNA): wikimedia-foundation · Vendor: wikiworks

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

Am I affected?

Timeline

2026-01-09 00:15 UTCPublished CVE record published
2026-06-17 10:20 UTCUpdated Record last modified

wikiworks approved revs DOWNGRADE

Affected: 1.39 · 1.43 · 1.44 · 1.45

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.39

1. Check installed version

apt-cache policy approved-revs || rpm -q approved-revs || approved-revs --version

2. No fixed release: DOWNGRADE to a release before 1.39 (Debian / Ubuntu)

apt-cache madison approved-revs sudo apt install approved-revs=<VERSION_BEFORE_1.39> sudo apt-mark hold approved-revs

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list approved-revs sudo dnf downgrade approved-revs-<VERSION_BEFORE_1.39> sudo dnf versionlock add approved-revs

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-2026-22712?

approved revs: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-22712 being exploited?

CVE-2026-22712 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-2026-22712 affect?

CVE-2026-22712 affects approved revs. Severity is medium (CVSS 4.3). Improper Encoding or Escaping of Output due to magic word replacement in ParserAfterTidy vulnerability in The Wikimedia Foundation Mediawiki - ApprovedRevs Extension allows Input Data Manipulation.This issue affects Mediawiki - ApprovedRevs

How urgent is CVE-2026-22712?

Priority 24/100. Public exploit reference

References

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