CVE-2026-46629
Twig: Unbounded formatter memoisation in twig/intl-extra keyed on template-controlled arguments
No known exploitation. EPSS puts it in the 46th percentile. Fixed in 3.26.0.
No public exploit knownFix3.26.0Upgrade to this build
e.g. OID 1.3.6.1.4.1.25623.1.1.1.1.2026.6311
What to do
Find your product and version, then upgrade to the build on the right.
- twigphp TwigAffected: < 3.26.0Upgrade to: not statedStated by: CVE record
- Symfony TwigAffected: < 3.26.0Upgrade to: 3.26.0Stated by: NVD
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
Twig is a template language for PHP. Prior to 3.26.0, twig/intl-extra memoises IntlDateFormatter and NumberFormatter instances in arrays keyed by template-controlled filter arguments such as locale, pattern, and attrs, allowing a template to allocate many ICU formatter objects that remain pinned for the lifetime of the Twig\Environment. This issue is fixed in version 3.26.0.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.5% chance of exploitation activity in the next 30 days, which ranks it in the 46th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
11 events over 121 days, from the signal feeds we watch.
- Patch availablerecord updated
- Patch availablerecord updated
- Record updatedrecord updated
- Publishedweakness classified, att&ck mapped, record updated
- OpenVAS check added
Affected products
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Scored 6.5 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required LowRequires basic user-level privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality NoneNo confidentiality impact
- Integrity NoneNo integrity impact
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
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