CVE-2026-44582: Next.js is a React framework for building full-stack web applications

Q: How do I fix CVE-2026-44582?

next.js: upgrade to 15.5.16, 16.2.5. Exact commands for each OS are on this page.

Q: Is CVE-2026-44582 being exploited?

CVE-2026-44582 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-44582 affect?

CVE-2026-44582 affects next.js. Severity is low (CVSS 3.7). Next.js is a React framework for building full-stack web applications. From 13.4.6 to before 15.5.16 and 16.2.5, React Server Component responses can be vulnerable to cache poisoning in deployments that rely on shared caches with insufficie

Q: How urgent is CVE-2026-44582?

Priority 21/100. Remotely exploitable, no login, no user action

Routine

LOW 3.7REMOTEUPGRADE

CVE-2026-44582 is a low-severity flaw (CVSS 3.7) affecting next.js. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Next.js is a React framework for building full-stack web applications. From 13.4.6 to before 15.5.16 and 16.2.5, React Server Component responses can be vulnerable to cache poisoning in deployments that rely on shared caches with insufficient response partitioning. In affected conditions, collisions in the _rsc cache-busting value can allow an attacker to poison cache entries so users receive the wrong response variant for a given URL. This vulne

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	3.7 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-328
Published	2026-05-13
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: vercel

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-13 18:16 UTCPublished CVE record published
2026-10-26 14:10 UTCUpdated Record last modified

vercel next.js UPGRADE

Affected: >= 13.4.6 and < 15.5.16 · >= 16.0.0 and < 16.2.5

Fixed in: 15.5.16, 16.2.5

Safe to downgrade to: a release before 13.4.6

1. Check installed version

npm ls next.js

2. UPGRADE to 15.5.16

npm install next.js@">=15.5.16"

3. If no update is available yet, DOWNGRADE to a release before 13.4.6

npm view next.js versions npm install next.js@"<13.4.6"

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-2026-44582?

next.js: upgrade to 15.5.16, 16.2.5. Exact commands for each OS are on this page.

Is CVE-2026-44582 being exploited?

CVE-2026-44582 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-2026-44582 affect?

CVE-2026-44582 affects next.js. Severity is low (CVSS 3.7). Next.js is a React framework for building full-stack web applications. From 13.4.6 to before 15.5.16 and 16.2.5, React Server Component responses can be vulnerable to cache poisoning in deployments that rely on shared caches with insufficie

How urgent is CVE-2026-44582?

Priority 21/100. Remotely exploitable, no login, no user action

Software pages

React vulnerabilities · Next.js vulnerabilities

Related CVEs

CVE-2026-44572 LOW 3.7 UPGRADE Next.js is a React framework for building full-stack web applications
CVE-2026-44575 HIGH 7.5 UPGRADE Next.js is a React framework for building full-stack web applications
CVE-2026-44573 HIGH 7.5 UPGRADE Next.js is a React framework for building full-stack web applications
CVE-2026-44574 HIGH 8.1 UPGRADE Next.js is a React framework for building full-stack web applications
CVE-2026-44577 MEDIUM 5.9 UPGRADE Next.js is a React framework for building full-stack web applications

References

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