How severe is CVE-2026-24425?

CVE-2026-24425 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-24425 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-24425?

CVE-2026-24425 affects Symfony Twig. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-24425?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-24425 have an EU (EUVD) identifier?

Yes. CVE-2026-24425 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31113.

When was CVE-2026-24425 published?

CVE-2026-24425 was published on 2026-05-20 and last updated on 2026-06-17.

CVE-2026-24425

CVE-2026-24425 is a high-severity vulnerability in Symfony Twig with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-693.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.7
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31113
Weakness: CWE-693
Affected product: Symfony Twig
Published: 2026-05-20
Last modified: 2026-06-17

Description

Twig versions 2.16.x and 3.9.0 through 3.25.x contain a sandbox bypass vulnerability when using a SourcePolicyInterface that allows attackers with template rendering capabilities to pass arbitrary PHP callables to sort, filter, map, and reduce filters. Attackers can exploit the runtime check that fails to use the current template source to bypass sandbox restrictions and execute arbitrary code when the sandbox is enabled through a source policy rather than globally.

Frequently asked questions

What is CVE-2026-24425?: Twig versions 2.16.x and 3.9.0 through 3.25.x contain a sandbox bypass vulnerability when using a SourcePolicyInterface that allows attackers with template rendering capabilities to pass arbitrary PHP callables to sort, filter, map, and reduce filters. Attackers can exploit the runtime check that fails to use the current template source to bypass sandbox restrictions and execute arbitrary code when the sandbox is enabled through a source policy rather than globally.
How severe is CVE-2026-24425?: CVE-2026-24425 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-24425 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-24425?: CVE-2026-24425 affects Symfony Twig. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-24425?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-24425 have an EU (EUVD) identifier?: Yes. CVE-2026-24425 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31113.
When was CVE-2026-24425 published?: CVE-2026-24425 was published on 2026-05-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:symfony:twig:*:*:*:*:*:*:*:*

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