CVE-2026-39371: RedwoodSDK is a server-first React framework

Routine

HIGH 8.1UPGRADE

CVE-2026-39371 is a high-severity flaw (CVSS 8.1) affecting redwoodsdk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

RedwoodSDK is a server-first React framework. From 1.0.0-beta.50 to 1.0.5, erver functions exported from "use server" files could be invoked via GET requests, bypassing their intended HTTP method. In cookie-authenticated applications, this allowed cross-site GET navigations to trigger state-changing functions, because browsers send SameSite=Lax cookies on top-level GET requests. This affected all server functions -- both serverAction() handlers a

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-352
Published	2026-04-07
Last modified	2026-07-24

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

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-07 20:16 UTCPublished CVE record published
2026-07-24 21:10 UTCUpdated Record last modified

redwoodjs redwoodsdk UPGRADE

Affected: >= 1.0.1 and < 1.0.6 · 1.0.0 beta50 · 1.0.0 beta51 · 1.0.0 beta52 · 1.0.0 beta53 · 1.0.0 beta53_test20260205213024 · 1.0.0 beta54 · 1.0.0 beta55

Fixed in: 1.0.6

Safe to downgrade to: a release before 1.0.0

1. Check installed version

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

2. UPGRADE to 1.0.6 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade redwoodsdk

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 1.0.0 (Debian / Ubuntu)

apt-cache madison redwoodsdk sudo apt install redwoodsdk=<VERSION_BEFORE_1.0.0> sudo apt-mark hold redwoodsdk

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

dnf --showduplicates list redwoodsdk sudo dnf downgrade redwoodsdk-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add redwoodsdk

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-2026-39371?

redwoodsdk: upgrade to 1.0.6. Exact commands for each OS are on this page.

Is CVE-2026-39371 being exploited?

CVE-2026-39371 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-2026-39371 affect?

CVE-2026-39371 affects redwoodsdk. Severity is high (CVSS 8.1). RedwoodSDK is a server-first React framework. From 1.0.0-beta.50 to 1.0.5, erver functions exported from "use server" files could be invoked via GET requests, bypassing their intended HTTP method. In cookie-authenticated applications, this

How urgent is CVE-2026-39371?

Priority 31/100. High severity

Software pages

React vulnerabilities

Related CVEs

CVE-2026-42190 MEDIUM 5.3 UPGRADE RedwoodSDK is a server-first React framework

References

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