Next.js unauth RCE in image optimization on Windows servers
Next.js image optimization on affected configurations (including Windows servers) can allow unauthenticated remote code execution. Upgrade to patched releases.
Also tracked as CVE-2026-75604 · Next.js image optimization RCE
First observed
Aug 25, 2026
Last observed
Aug 25, 2026
Last reviewed
Sep 20, 2026
Tracking ended
Aug 25, 2026
Uncertainty and limitations
Read the evidence limits before acting on this record.
Confirm exact fixed Next.js versions and whether your deployment uses the vulnerable image optimization path.
- Exact fixed versions must come from the vendor advisory.
- HOL blog is operator guidance.
Timeline
Reviewed events, oldest first, each tied to a verified source.
- Disclosure
CVE-2026-75604 Next.js unauth RCE via image optimization disclosed.
- Update
HOL Guard published operator coverage.
Publication clock: 643.0 hours from reviewed disclosure timestamp to HOL publication; 12-hour critical target; historical backfill outside target.
Guard coverage and non-coverage
What Guard's reviewed coverage assertions do and do not claim for this campaign.
No Guard coverage mapping is published for this record.
Defensive policy guidance
Reviewed starting points for defending against this campaign's artifact classes.
No campaign-specific policy guidance is published.
Reviewed artifacts and indicators
Published values are defanged (for example hxxps and [.] blocks) so nothing here is copy-paste executable.
Reviewed artifacts
The specific artifacts this record concerns, as reviewed. Names and versions are shown as text; a registry link is not recorded here.
nextnpmpackage
Sources
Every claim on this record is traceable to the sources below.
Reviewed in full by HOL Guard Security Publishing.
- Published
- Last full review
- Last modified
Record HGTC-2026-E6F338CC.