CVE-2021-46334: Moddable SDK v11.5.0 was discovered to contain a stack buffer overflow via the component __interceptor_strcat.

This month

HIGH 7.8DOWNGRADE

CVE-2021-46334 is a high-severity flaw (CVSS 7.8) affecting moddable sdk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Moddable SDK v11.5.0 was discovered to contain a stack buffer overflow via the component __interceptor_strcat.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 42%)
CISA exploited list	No
Weakness	CWE-787
Published	2022-01-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: moddable

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

Am I affected?

Timeline

2022-01-20 22:15 UTCPublished CVE record published
2026-06-17 04:14 UTCUpdated Record last modified

moddable moddable sdk DOWNGRADE

Affected: 11.5.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.5.0

1. Check installed version

apt-cache policy moddable-sdk || rpm -q moddable-sdk || moddable-sdk --version

2. No fixed release: DOWNGRADE to a release before 11.5.0 (Debian / Ubuntu)

apt-cache madison moddable-sdk sudo apt install moddable-sdk=<VERSION_BEFORE_11.5.0> sudo apt-mark hold moddable-sdk

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

dnf --showduplicates list moddable-sdk sudo dnf downgrade moddable-sdk-<VERSION_BEFORE_11.5.0> sudo dnf versionlock add moddable-sdk

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-2021-46334?

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

Is CVE-2021-46334 being exploited?

CVE-2021-46334 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-2021-46334 affect?

CVE-2021-46334 affects moddable sdk. Severity is high (CVSS 7.8). Moddable SDK v11.5.0 was discovered to contain a stack buffer overflow via the component __interceptor_strcat.

How urgent is CVE-2021-46334?

Priority 47/100. High severity; Public exploit reference

Related CVEs

CVE-2021-46335 MEDIUM 5.5 DOWNGRADE Moddable SDK v11.5.0 was discovered to contain a NULL pointer dereference in the component fx_Function_prototy
CVE-2021-46333 MEDIUM 5.5 DOWNGRADE Moddable SDK v11.5.0 was discovered to contain an invalid memory access vulnerability via the component __asan
CVE-2021-46332 HIGH 7.8 DOWNGRADE Moddable SDK v11.5.0 was discovered to contain a heap-buffer-overflow via xs/sources/xsDataView.c in fxUint8Ge
CVE-2021-46331 MEDIUM 5.5 DOWNGRADE Moddable SDK v11.5.0 was discovered to contain a SEGV vulnerability via xs/sources/xsProxy.c in fxProxyGetProt
CVE-2021-46330 MEDIUM 5.5 DOWNGRADE Moddable SDK v11.5.0 was discovered to contain a SEGV vulnerability via xs/sources/xsDataView.c in fx_ArrayBuf

References

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