Twig Sandbox Information Disclosure

published 2019-03-23 7 y ago modified 2026-06-17 4 mo ago also GHSA-vxrc-68xx-x48g , EUVD-2022-1558

cvss: 3.7; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.4%; EPSS 1.4% chance of exploitation in 30 days, percentile 72%
public exploits: 0; none known

A sandbox information disclosure exists in Twig before 1.38.0 and 2.x before 2.7.0 because, under some circumstances, it is possible to call the __toString() method on an object even if not allowed by the security policy in place.

Patch / fix

fixed in 2 distros 1 links 2

packagist twig/twig 1.38.0, 2.7.0
symfony twig 1.38.0, 2.7.0

twig Ubuntu Pro 16.04 LTS 1.23.1-1ubuntu4+esm1
twig Ubuntu Pro 18.04 LTS 2.4.6-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2019-9942

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

github.com/twigphp/Twig@eac5422 commit
symfony.com/blog/twig-sandbox-information-disclosure advisory

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-9942 updated 2025-11-21 cvss 4.3

php-twig: sandbox information disclosure

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.41% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	3.7	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:P/I:N/A:N
GitHub	3.1	3.7	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
packagist	twig/twig	<1.38.0 >=2.0.0, <2.7.0	1.38.0 2.7.0

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

github.com /twigphp/Twig/commit/eac5422956e1dcca89a3669a03a3ff32f0502077
web, patch, third-party-advisory
symfony.com /blog/twig-sandbox-information-disclosure
web, patch, vendor-advisory
debian.org /security/2019/dsa-4419
vendor-advisory, web, third-party-advisory
seclists.org /bugtraq/2019/Mar/60
mailing-list, web, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2019-9942
advisory
github.com /FriendsOfPHP/security-advisories/blob/master/twig/twig/CVE-2019-9942.yaml
web
github.com /twigphp/Twig
package

Sources

CVE List CVE-2019-9942
GitHub Advisory GHSA-vxrc-68xx-x48g
NVD CVE-2019-9942

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary