CVE-2026-31819: Sylius is an Open Source eCommerce Framework on Symfony

Routine

MEDIUM 6.1UPGRADE

CVE-2026-31819 is a medium-severity flaw (CVSS 6.1) affecting sylius. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Sylius is an Open Source eCommerce Framework on Symfony. CurrencySwitchController::switchAction(), ImpersonateUserController::impersonateAction() and StorageBasedLocaleSwitcher::handle() use the HTTP Referer header directly when redirecting. The attack requires the victim to click a legitimate application link placed on an attacker-controlled page. The browser automatically sends the attacker's site as the Referer, and the application redirects b

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-601
Published	2026-03-10
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2026-03-10 22:16 UTCPublished CVE record published
2026-06-17 10:34 UTCUpdated Record last modified

sylius sylius UPGRADE

Affected: < 1.9.12 · >= 1.10.0 and < 1.10.16 · >= 1.11.0 and < 1.11.17 · >= 1.12.0 and < 1.12.23 · >= 1.13.0 and < 1.13.15 · >= 1.14.0 and < 1.14.18 · >= 2.0.0 and < 2.0.16 · >= 2.1.0 and < 2.1.12

Fixed in: 1.9.12, 1.10.16, 1.11.17, 1.12.23, 1.13.15, 1.14.18, 2.0.16, 2.1.12, 2.2.3

Safe to downgrade to: a release before 1.10.0

1. Check installed version

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

2. UPGRADE to 1.9.12 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sylius

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 1.10.0 (Debian / Ubuntu)

apt-cache madison sylius sudo apt install sylius=<VERSION_BEFORE_1.10.0> sudo apt-mark hold sylius

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

dnf --showduplicates list sylius sudo dnf downgrade sylius-<VERSION_BEFORE_1.10.0> sudo dnf versionlock add sylius

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-2026-31819?

sylius: upgrade to 1.9.12, 1.10.16, 1.11.17, 1.12.23, 1.13.15, 1.14.18, 2.0.16, 2.1.12, 2.2.3. Exact commands for each OS are on this page.

Is CVE-2026-31819 being exploited?

CVE-2026-31819 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-2026-31819 affect?

CVE-2026-31819 affects sylius. Severity is medium (CVSS 6.1). Sylius is an Open Source eCommerce Framework on Symfony. CurrencySwitchController::switchAction(), ImpersonateUserController::impersonateAction() and StorageBasedLocaleSwitcher::handle() use the HTTP Referer header directly when redirecting

How urgent is CVE-2026-31819?

Priority 23/100. No elevated risk signals yet.

Related CVEs

CVE-2026-31825 MEDIUM 5.3 UPGRADE Sylius is an Open Source eCommerce Framework on Symfony
CVE-2026-31824 HIGH 8.2 UPGRADE Sylius is an Open Source eCommerce Framework on Symfony
CVE-2026-31823 MEDIUM 4.8 UPGRADE Sylius is an Open Source eCommerce Framework on Symfony
CVE-2026-31822 MEDIUM 6.1 UPGRADE Sylius is an Open Source eCommerce Framework on Symfony
CVE-2026-31821 MEDIUM 5.3 UPGRADE Sylius is an Open Source eCommerce Framework on Symfony

References

← Back to latest CVEs