CVE-2024-21634: Amazon Ion is a Java implementation of the Ion data notation

Q: How do I fix CVE-2024-21634?

ion: upgrade to 1.10.5. Exact commands for each OS are on this page.

Q: Is CVE-2024-21634 being exploited?

CVE-2024-21634 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-2024-21634 affect?

CVE-2024-21634 affects ion. Severity is high (CVSS 7.5). Amazon Ion is a Java implementation of the Ion data notation. Prior to version 1.10.5, a potential denial-of-service issue exists in `ion-java` for applications that use `ion-java` to deserialize Ion text encoded data, or deserialize Ion te

Q: How urgent is CVE-2024-21634?

Priority 51/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

This month

HIGH 7.5REMOTEWATCHLISTUPGRADE

CVE-2024-21634 is a high-severity flaw (CVSS 7.5) affecting ion. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Amazon Ion is a Java implementation of the Ion data notation. Prior to version 1.10.5, a potential denial-of-service issue exists in `ion-java` for applications that use `ion-java` to deserialize Ion text encoded data, or deserialize Ion text or binary encoded data into the `IonValue` model and then invoke certain `IonValue` methods on that in-memory representation. An actor could craft Ion data that, when loaded by the affected application and/o

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-770
Published	2024-01-03
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2024-01-03 23:15 UTCPublished CVE record published
2026-06-17 07:09 UTCUpdated Record last modified

amazon ion UPGRADE

Affected: < 1.10.5

Fixed in: 1.10.5

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.10.5 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ion

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-2024-21634?

ion: upgrade to 1.10.5. Exact commands for each OS are on this page.

Is CVE-2024-21634 being exploited?

CVE-2024-21634 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-2024-21634 affect?

CVE-2024-21634 affects ion. Severity is high (CVSS 7.5). Amazon Ion is a Java implementation of the Ion data notation. Prior to version 1.10.5, a potential denial-of-service issue exists in `ion-java` for applications that use `ion-java` to deserialize Ion text encoded data, or deserialize Ion te

How urgent is CVE-2024-21634?

Priority 51/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Java vulnerabilities

Related CVEs

CVE-2023-30857 LOW 3.7 UPGRADE @aedart/support is the support package for Ion, a monorepo for JavaScript/TypeScript packages

References

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