DEBIAN-CVE-2026-121373

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Source
https://security-tracker.debian.org/tracker/CVE-2026-121373
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-121373.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-121373
Upstream
Published
2026-11-04T13:17:27Z
Modified
2026-11-07T22:00:06Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
Summary
[none]
Details

The Symfony HtmlSanitizer component MetaRefreshAttributeSanitizer, introduced to fix CVE-2026-48761, sanitizes the refresh URL of content attributes of meta tags using a regular expression that is too narrow, allowing sanitization to be bypassed, and resulting in potential URL redirection to untrusted sites in Symfony versions 6.1.x prior to 6.4.50, 7.x prior to 7.4.23, and 8.x prior to 8.1.11. The shared declarative refresh steps in the WHATWG HTML Standard require a broader approach: the separator after the time may be ASCII whitespace alone, with no ; or ,, and the url= keyword is optional. Directives the browser honours, but the regular expression misses are returned unchanged, so the attacker URL skips UrlSanitizer entirely and both allowLinkSchemes and allowLinkHosts are defeated for the refresh navigation. This is reachable under any configuration that allows meta with http-equiv and content, including the documented allowStaticElements() preset.

References

Affected packages

Debian:12 / symfony

Package

Name
symfony
Purl
pkg:deb/debian/symfony?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.4.23+dfsg-1
5.4.23+dfsg-1+deb12u1
5.4.23+dfsg-1+deb12u2
5.4.23+dfsg-1+deb12u3
5.4.23+dfsg-1+deb12u4
5.4.23+dfsg-1+deb12u5
5.4.24+dfsg-1
5.4.25+dfsg-1
5.4.27+dfsg-1
5.4.28+dfsg-1
5.4.29+dfsg-1
5.4.30+dfsg-1
5.4.31+dfsg-1
5.4.31+dfsg-2
5.4.32+dfsg-1
5.4.33+dfsg-1
5.4.34+dfsg-1
5.4.34+dfsg-2
5.4.35+dfsg-1
5.4.35+dfsg-2
5.4.35+dfsg-3
5.4.52+dfsg-0+deb12u1
5.4.53+dfsg-0+deb12u1
6.*
6.3.0~rc1+dfsg-1
6.3.0~rc2+dfsg-1
6.3.0+dfsg-1
6.3.1+dfsg-1
6.3.3+dfsg-1
6.3.4+dfsg-1
6.3.5+dfsg-1
6.3.6+dfsg-1
6.3.7+dfsg-1
6.4.0~beta2+dfsg-1
6.4.0~beta3+dfsg-1
6.4.0~rc1+dfsg-1
6.4.0~rc2+dfsg-1
6.4.0+dfsg-1
6.4.1+dfsg-1
6.4.2+dfsg-1
6.4.3+dfsg-1
6.4.4+dfsg-1
6.4.4+dfsg-2
6.4.4+dfsg-3
6.4.4+dfsg-4
6.4.5+dfsg-1
6.4.5+dfsg-2
6.4.5+dfsg-3
6.4.5+dfsg-4
6.4.6+dfsg-1
6.4.7+dfsg-1
6.4.9+dfsg-1
6.4.10+dfsg-1
6.4.11+dfsg-1
6.4.12+dfsg-1
6.4.13+dfsg-1
6.4.14+dfsg-1
6.4.15+dfsg-1
6.4.16+dfsg-1
6.4.16+dfsg-2
6.4.17+dfsg-1
6.4.17+dfsg-2
6.4.17+dfsg-3
6.4.17+dfsg-4
6.4.17+dfsg-5
6.4.17+dfsg-6
6.4.18+dfsg-1
6.4.19+dfsg-1
6.4.19+dfsg-2
6.4.20+dfsg-1
6.4.20+dfsg-2
6.4.21+dfsg-1
6.4.21+dfsg-2
6.4.24+dfsg-1
6.4.25+dfsg-1
7.*
7.0.4+dfsg-1
7.0.5+dfsg-1
7.0.6+dfsg-1
7.0.7+dfsg-1
7.1.0~beta1+dfsg-1
7.1.0~rc1+dfsg-1
7.1.2+dfsg-1
7.1.3+dfsg-1
7.1.4+dfsg-1
7.1.5+dfsg-1
7.2.0~beta1+dfsg-1
7.2.0~beta2+dfsg-1
7.2.0~rc1+dfsg-1
7.2.1+dfsg-1
7.2.2+dfsg-1
7.2.3+dfsg-1
7.2.4+dfsg-1
7.2.5+dfsg-1
7.2.6-1
7.3.0~beta1+dfsg-1
7.3.0~beta2+dfsg-1
7.3.0~rc1+dfsg-1
7.3.0+dfsg-1
7.3.1+dfsg-1
7.3.2+dfsg-1
7.3.3+dfsg-1
7.3.4+dfsg-1
7.3.5-1
7.4.0~beta1-1
7.4.0~beta1-2
7.4.0~beta2+dfsg-1
7.4.0~beta2+dfsg-2
7.4.0~beta2+dfsg-3
7.4.0~rc1+dfsg-1
7.4.0~rc2+dfsg-1
7.4.0~rc3+dfsg-1
7.4.0+dfsg-1
7.4.0+dfsg-2
7.4.2+dfsg-1
7.4.2+dfsg-2
7.4.3+dfsg-1
7.4.4+dfsg-1
7.4.5+dfsg-1
7.4.6+dfsg-1
7.4.6+dfsg-2
7.4.7+dfsg-1
7.4.8+dfsg-1
7.4.9+dfsg-1
7.4.10+dfsg-1
7.4.12+dfsg-1
7.4.13+dfsg-1
7.4.13+dfsg-2
7.4.14+dfsg-1
7.4.15+dfsg-1
7.4.15+dfsg-2
7.4.16+dfsg-1
7.4.17+dfsg-1
7.4.18+dfsg-1
7.4.19+dfsg-1
7.4.20+dfsg-1
7.4.21+dfsg-1
7.4.21+dfsg-2
7.4.22+dfsg-1
7.4.23+dfsg-1
8.*
8.0.0~beta2+dfsg-1
8.0.0~beta2+dfsg-2
8.0.0~rc1+dfsg-1
8.0.0~rc2+dfsg-1
8.0.0~rc3+dfsg-1
8.0.0+dfsg-1
8.0.2+dfsg-1
8.0.3+dfsg-1
8.0.4+dfsg-1
8.0.5+dfsg-1
8.0.6+dfsg-1
8.0.7+dfsg-1
8.0.8+dfsg-1
8.0.9+dfsg-1
8.0.10-1
8.0.11+dfsg-1
8.0.12+dfsg-1
8.0.13+dfsg-1
8.1.0+dfsg-1
8.1.1+dfsg-1
8.1.3+dfsg-1
8.1.4+dfsg-1
8.1.5+dfsg-1
8.1.6+dfsg-1
8.1.7+dfsg-1
8.1.8+dfsg-1
8.1.9+dfsg-1
8.1.10+dfsg-1
8.1.11+dfsg-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-121373.json"

Debian:13 / symfony

Package

Name
symfony
Purl
pkg:deb/debian/symfony?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

6.*
6.4.21+dfsg-2
6.4.21+dfsg-2+deb13u1
6.4.24+dfsg-1
6.4.25+dfsg-1
6.4.40+dfsg-0+deb13u1
6.4.41+dfsg-0+deb13u1
6.4.49+dfsg-0+deb13u1
7.*
7.0.4+dfsg-1
7.0.5+dfsg-1
7.0.6+dfsg-1
7.0.7+dfsg-1
7.1.0~beta1+dfsg-1
7.1.0~rc1+dfsg-1
7.1.2+dfsg-1
7.1.3+dfsg-1
7.1.4+dfsg-1
7.1.5+dfsg-1
7.2.0~beta1+dfsg-1
7.2.0~beta2+dfsg-1
7.2.0~rc1+dfsg-1
7.2.1+dfsg-1
7.2.2+dfsg-1
7.2.3+dfsg-1
7.2.4+dfsg-1
7.2.5+dfsg-1
7.2.6-1
7.3.0~beta1+dfsg-1
7.3.0~beta2+dfsg-1
7.3.0~rc1+dfsg-1
7.3.0+dfsg-1
7.3.1+dfsg-1
7.3.2+dfsg-1
7.3.3+dfsg-1
7.3.4+dfsg-1
7.3.5-1
7.4.0~beta1-1
7.4.0~beta1-2
7.4.0~beta2+dfsg-1
7.4.0~beta2+dfsg-2
7.4.0~beta2+dfsg-3
7.4.0~rc1+dfsg-1
7.4.0~rc2+dfsg-1
7.4.0~rc3+dfsg-1
7.4.0+dfsg-1
7.4.0+dfsg-2
7.4.2+dfsg-1
7.4.2+dfsg-2
7.4.3+dfsg-1
7.4.4+dfsg-1
7.4.5+dfsg-1
7.4.6+dfsg-1
7.4.6+dfsg-2
7.4.7+dfsg-1
7.4.8+dfsg-1
7.4.9+dfsg-1
7.4.10+dfsg-1
7.4.12+dfsg-1
7.4.13+dfsg-1
7.4.13+dfsg-2
7.4.14+dfsg-1
7.4.15+dfsg-1
7.4.15+dfsg-2
7.4.16+dfsg-1
7.4.17+dfsg-1
7.4.18+dfsg-1
7.4.19+dfsg-1
7.4.20+dfsg-1
7.4.21+dfsg-1
7.4.21+dfsg-2
7.4.22+dfsg-1
7.4.23+dfsg-1
8.*
8.0.0~beta2+dfsg-1
8.0.0~beta2+dfsg-2
8.0.0~rc1+dfsg-1
8.0.0~rc2+dfsg-1
8.0.0~rc3+dfsg-1
8.0.0+dfsg-1
8.0.2+dfsg-1
8.0.3+dfsg-1
8.0.4+dfsg-1
8.0.5+dfsg-1
8.0.6+dfsg-1
8.0.7+dfsg-1
8.0.8+dfsg-1
8.0.9+dfsg-1
8.0.10-1
8.0.11+dfsg-1
8.0.12+dfsg-1
8.0.13+dfsg-1
8.1.0+dfsg-1
8.1.1+dfsg-1
8.1.3+dfsg-1
8.1.4+dfsg-1
8.1.5+dfsg-1
8.1.6+dfsg-1
8.1.7+dfsg-1
8.1.8+dfsg-1
8.1.9+dfsg-1
8.1.10+dfsg-1
8.1.11+dfsg-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-121373.json"

Debian:14 / symfony

Package

Name
symfony
Purl
pkg:deb/debian/symfony?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
7.4.23+dfsg-1

Affected versions

6.*
6.4.21+dfsg-2
6.4.24+dfsg-1
6.4.25+dfsg-1
7.*
7.0.4+dfsg-1
7.0.5+dfsg-1
7.0.6+dfsg-1
7.0.7+dfsg-1
7.1.0~beta1+dfsg-1
7.1.0~rc1+dfsg-1
7.1.2+dfsg-1
7.1.3+dfsg-1
7.1.4+dfsg-1
7.1.5+dfsg-1
7.2.0~beta1+dfsg-1
7.2.0~beta2+dfsg-1
7.2.0~rc1+dfsg-1
7.2.1+dfsg-1
7.2.2+dfsg-1
7.2.3+dfsg-1
7.2.4+dfsg-1
7.2.5+dfsg-1
7.2.6-1
7.3.0~beta1+dfsg-1
7.3.0~beta2+dfsg-1
7.3.0~rc1+dfsg-1
7.3.0+dfsg-1
7.3.1+dfsg-1
7.3.2+dfsg-1
7.3.3+dfsg-1
7.3.4+dfsg-1
7.3.5-1
7.4.0~beta1-1
7.4.0~beta1-2
7.4.0~beta2+dfsg-1
7.4.0~beta2+dfsg-2
7.4.0~beta2+dfsg-3
7.4.0~rc1+dfsg-1
7.4.0~rc2+dfsg-1
7.4.0~rc3+dfsg-1
7.4.0+dfsg-1
7.4.0+dfsg-2
7.4.2+dfsg-1
7.4.2+dfsg-2
7.4.3+dfsg-1
7.4.4+dfsg-1
7.4.5+dfsg-1
7.4.6+dfsg-1
7.4.6+dfsg-2
7.4.7+dfsg-1
7.4.8+dfsg-1
7.4.9+dfsg-1
7.4.10+dfsg-1
7.4.12+dfsg-1
7.4.13+dfsg-1
7.4.13+dfsg-2
7.4.14+dfsg-1
7.4.15+dfsg-1
7.4.15+dfsg-2
7.4.16+dfsg-1
7.4.17+dfsg-1
7.4.18+dfsg-1
7.4.19+dfsg-1
7.4.20+dfsg-1
7.4.21+dfsg-1
7.4.21+dfsg-2
7.4.22+dfsg-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-121373.json"