CVE-2022-21707: wasmCloud Host Runtime is a server process that securely hosts and provides dispatch for web assembly (WASM) a

Q: How do I fix CVE-2022-21707?

host runtime: upgrade to 0.52.2. Exact commands for each OS are on this page.

Q: Is CVE-2022-21707 being exploited?

CVE-2022-21707 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-21707 affect?

CVE-2022-21707 affects host runtime. Severity is medium (CVSS 6.3). wasmCloud Host Runtime is a server process that securely hosts and provides dispatch for web assembly (WASM) actors and capability providers. In versions prior to 0.52.2 actors can bypass capability authorization. Actors are normally requir

Q: How urgent is CVE-2022-21707?

Priority 36/100. No elevated risk signals yet.

Routine

MEDIUM 6.3UPGRADE

CVE-2022-21707 is a medium-severity flaw (CVSS 6.3) affecting host runtime. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

wasmCloud Host Runtime is a server process that securely hosts and provides dispatch for web assembly (WASM) actors and capability providers. In versions prior to 0.52.2 actors can bypass capability authorization. Actors are normally required to declare their capabilities for inbound invocations, but with this vulnerability actor capability claims are not verified upon receiving invocations. This compromises the security model for actors as they

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-863, CWE-862
Published	2022-01-21
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: wasmcloud

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

Am I affected?

Timeline

2022-01-21 23:15 UTCPublished CVE record published
2026-06-17 04:26 UTCUpdated Record last modified

wasmcloud host runtime UPGRADE

Affected: < 0.52.2

Fixed in: 0.52.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy host-runtime || rpm -q host-runtime || host-runtime --version

2. UPGRADE to 0.52.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade host-runtime

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade host-runtime

Note

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

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-2022-21707?

host runtime: upgrade to 0.52.2. Exact commands for each OS are on this page.

Is CVE-2022-21707 being exploited?

CVE-2022-21707 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-2022-21707 affect?

CVE-2022-21707 affects host runtime. Severity is medium (CVSS 6.3). wasmCloud Host Runtime is a server process that securely hosts and provides dispatch for web assembly (WASM) actors and capability providers. In versions prior to 0.52.2 actors can bypass capability authorization. Actors are normally requir

How urgent is CVE-2022-21707?

Priority 36/100. No elevated risk signals yet.

References

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