CVE-2026-34043
medium
CVSS v3
—
CVSS v2
—
VIR risk
5.5
Description
Serialize JavaScript has CPU Exhaustion Denial of Service via crafted array-like objects
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-34043
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2026:21293
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rhel | 9 | fixed | |
| debian | bookworm | affected | |
| debian | bullseye | affected | |
| debian | forky | fixed | 7.0.5+~5.0.4-1 |
| debian | sid | fixed | 7.0.5+~5.0.4-1 |
| debian | trixie | affected | |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| npm | serialize-javascript | >=5.0.0,<7.0.5 | 7.0.5 |
| NPM | serialize-javascript | >= 5.0.0, < 7.0.5 | 7.0.5 |
References
- https://access.redhat.com/errata/RHSA-2026:21293
- https://github.com/yahoo/serialize-javascript/security/advisories/GHSA-qj8w-gfj5-8c6v
- https://nvd.nist.gov/vuln/detail/CVE-2026-34043
- https://github.com/yahoo/serialize-javascript/commit/f147e90269b58bb6e539cfdf3d0e20d6ad14204b
- https://github.com/yahoo/serialize-javascript
- https://github.com/yahoo/serialize-javascript/releases/tag/v5.0.0
- https://github.com/yahoo/serialize-javascript/releases/tag/v7.0.5
- https://security-tracker.debian.org/tracker/CVE-2026-34043
- https://github.com/advisories/GHSA-qj8w-gfj5-8c6v
Verify integrity in audit chain (admin only). AS-IS.