CVE-2023-46331: WebAssembly wabt 1.0.33 has an Out-of-Bound Memory Read in in DataSegment::IsValidRange(), which lead to segme

Routine

MEDIUM 5.5DOWNGRADE

CVE-2023-46331 is a medium-severity flaw (CVSS 5.5) affecting webassembly binary toolkit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

WebAssembly wabt 1.0.33 has an Out-of-Bound Memory Read in in DataSegment::IsValidRange(), which lead to segmentation fault.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-125
Published	2023-10-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: webassembly

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

Am I affected?

Timeline

2023-10-23 17:15 UTCPublished CVE record published
2026-06-17 06:30 UTCUpdated Record last modified

webassembly webassembly binary toolkit DOWNGRADE

Affected: 1.0.33

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.33

1. Check installed version

apt-cache policy webassembly-binary-toolkit || rpm -q webassembly-binary-toolkit || webassembly-binary-toolkit --version

2. No fixed release: DOWNGRADE to a release before 1.0.33 (Debian / Ubuntu)

apt-cache madison webassembly-binary-toolkit sudo apt install webassembly-binary-toolkit=<VERSION_BEFORE_1.0.33> sudo apt-mark hold webassembly-binary-toolkit

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

dnf --showduplicates list webassembly-binary-toolkit sudo dnf downgrade webassembly-binary-toolkit-<VERSION_BEFORE_1.0.33> sudo dnf versionlock add webassembly-binary-toolkit

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-2023-46331?

webassembly binary toolkit: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-46331 being exploited?

CVE-2023-46331 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-2023-46331 affect?

CVE-2023-46331 affects webassembly binary toolkit. Severity is medium (CVSS 5.5). WebAssembly wabt 1.0.33 has an Out-of-Bound Memory Read in in DataSegment::IsValidRange(), which lead to segmentation fault.

How urgent is CVE-2023-46331?

Priority 22/100. No elevated risk signals yet.

Related CVEs

CVE-2025-3122 LOW 3.1 DOWNGRADE A vulnerability classified as problematic was found in WebAssembly wabt 1.0.36
CVE-2023-46332 MEDIUM 5.5 DOWNGRADE WebAssembly wabt 1.0.33 contains an Out-of-Bound Memory Write in DataSegment::Drop(), which lead to segmentati

References

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