DEBIAN-CVE-2026-15747

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Source
https://security-tracker.debian.org/tracker/CVE-2026-15747
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-15747.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-15747
Upstream
Published
2026-07-14T18:17:12Z
Modified
2026-09-14T17:02:47Z
Severity
  • 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
[none]
Details

Mojolicious versions from 4.59 before 9.48 for Perl expose a stable representation of the session CSRF token to a BREACH compression oracle. _csrf_token generates and caches one token per session and returns the same value on every call, and _csrf_field places that value in a hidden csrf_token input. When a response carrying the token also echoes attacker-controlled input and is gzip-compressed, the chosen values and the resulting compressed lengths form a BREACH oracle. An attacker able to query it can recover the token and pass csrf_protect validation.

References

Affected packages

Debian:12 / libmojolicious-perl

Package

Name
libmojolicious-perl
Purl
pkg:deb/debian/libmojolicious-perl?arch=source&distro=bookworm

Affected ranges

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

Affected versions

9.*
9.31+dfsg-1
9.33+dfsg-1
9.34+dfsg-1
9.35+dfsg-1
9.36+dfsg-1~bpo12+2
9.36+dfsg-1
9.37+dfsg-1
9.37+dfsg-2~bpo12+1
9.37+dfsg-2
9.38+dfsg-1
9.39+dfsg-1
9.42+dfsg-1~bpo13+2
9.42+dfsg-1
9.45+dfsg-1
9.45+dfsg-2
9.46+dfsg-1
9.47+dfsg-1
9.48+dfsg-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-15747.json"

Debian:13 / libmojolicious-perl

Package

Name
libmojolicious-perl
Purl
pkg:deb/debian/libmojolicious-perl?arch=source&distro=trixie

Affected ranges

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

Affected versions

9.*
9.39+dfsg-1
9.42+dfsg-1~bpo13+2
9.42+dfsg-1
9.45+dfsg-1
9.45+dfsg-2
9.46+dfsg-1
9.47+dfsg-1
9.48+dfsg-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-15747.json"

Debian:14 / libmojolicious-perl

Package

Name
libmojolicious-perl
Purl
pkg:deb/debian/libmojolicious-perl?arch=source&distro=forky

Affected ranges

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

Affected versions

9.*
9.39+dfsg-1
9.42+dfsg-1~bpo13+2
9.42+dfsg-1
9.45+dfsg-1
9.45+dfsg-2
9.46+dfsg-1
9.47+dfsg-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-15747.json"