CVE-2025-69654: A crafted JavaScript input executed with the QuickJS release 2025-09-13, fixed in commit fcd33c1afa7b3028531f5

This week

HIGH 7.5REMOTEUPGRADE

CVE-2025-69654 is a high-severity flaw (CVSS 7.5) affecting quickjs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A crafted JavaScript input executed with the QuickJS release 2025-09-13, fixed in commit fcd33c1afa7b3028531f53cd1190a3877454f6b3 (2025-12-11),`qjs` interpreter using the `-m` option and a low memory limit can cause an out-of-memory condition followed by an assertion failure in JS_FreeRuntime (list_empty(&rt->gc_obj_list)) during runtime cleanup. Although the engine reports an OOM error, it subsequently aborts with SIGABRT because the GC object l

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

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	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-400
Published	2026-03-06
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: quickjs project

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

Am I affected?

Timeline

2026-03-06 20:16 UTCPublished CVE record published
2026-06-17 10:00 UTCUpdated Record last modified

quickjs project quickjs UPGRADE

Affected: >= 2025-09-13 and < 2025-12-11

Fixed in: 2025-12-11

Safe to downgrade to: a release before 2025-09-13

1. Check installed version

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

2. UPGRADE to 2025-12-11 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade quickjs

Note

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

3. If no update is available yet, DOWNGRADE to a release before 2025-09-13 (Debian / Ubuntu)

apt-cache madison quickjs sudo apt install quickjs=<VERSION_BEFORE_2025-09-13> sudo apt-mark hold quickjs

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list quickjs sudo dnf downgrade quickjs-<VERSION_BEFORE_2025-09-13> sudo dnf versionlock add quickjs

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-2025-69654?

quickjs: upgrade to 2025-12-11. Exact commands for each OS are on this page.

Is CVE-2025-69654 being exploited?

CVE-2025-69654 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-2025-69654 affect?

CVE-2025-69654 affects quickjs. Severity is high (CVSS 7.5). A crafted JavaScript input executed with the QuickJS release 2025-09-13, fixed in commit fcd33c1afa7b3028531f53cd1190a3877454f6b3 (2025-12-11),`qjs` interpreter using the `-m` option and a low memory limit can cause an out-of-memory conditi

How urgent is CVE-2025-69654?

Priority 42/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

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References

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