UBUNTU-CVE-2026-77568 (CVE-2026-77568)
Vulnerability from osv_ubuntu – Published: 2026-09-21 00:00 – Updated: 2026-09-21 00:00 – Source website
Withdrawn 2026-09-23
VLAI
Details
Mojolicious is a real-time web framework for Perl. Prior to 9.48, the Mojolicious CSRF helpers csrf_field, csrf_token, and csrf_protect reuse an unchanged per-session token in rendered HTML. When response compression is enabled and attacker-influenced content is reflected in the same response, an unauthenticated attacker who can induce many victim requests and observe response sizes can use a BREACH compression side channel to recover the token and forge cross-site requests. API-only deployments that never render the token in HTML are not affected. This issue is fixed in version 9.48.
Severity
4.2 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcgi-fast-perl",
"binary_version": "5.18.2-2ubuntu1.7+esm9"
},
{
"binary_name": "libperl5.18",
"binary_version": "5.18.2-2ubuntu1.7+esm9"
},
{
"binary_name": "perl",
"binary_version": "5.18.2-2ubuntu1.7+esm9"
},
{
"binary_name": "perl-base",
"binary_version": "5.18.2-2ubuntu1.7+esm9"
},
{
"binary_name": "perl-debug",
"binary_version": "5.18.2-2ubuntu1.7+esm9"
},
{
"binary_name": "perl-modules",
"binary_version": "5.18.2-2ubuntu1.7+esm9"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "perl",
"purl": "pkg:deb/ubuntu/perl@5.18.2-2ubuntu1.7+esm9?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.14.2-21build1",
"5.18.1-4",
"5.18.1-4build1",
"5.18.1-5",
"5.18.2-2",
"5.18.2-2ubuntu1",
"5.18.2-2ubuntu1.1",
"5.18.2-2ubuntu1.3",
"5.18.2-2ubuntu1.4",
"5.18.2-2ubuntu1.6",
"5.18.2-2ubuntu1.7",
"5.18.2-2ubuntu1.7+esm3",
"5.18.2-2ubuntu1.7+esm4",
"5.18.2-2ubuntu1.7+esm5",
"5.18.2-2ubuntu1.7+esm7",
"5.18.2-2ubuntu1.7+esm8",
"5.18.2-2ubuntu1.7+esm9"
]
},
{
"ecosystem_specific": {
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{
"binary_name": "libperl5.22",
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},
{
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},
{
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},
{
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},
{
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}
]
},
"package": {
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"name": "perl",
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},
"ranges": [
{
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{
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}
],
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}
],
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"5.22.1-3",
"5.22.1-4",
"5.22.1-5",
"5.22.1-7",
"5.22.1-8",
"5.22.1-9",
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"5.22.1-9ubuntu0.3",
"5.22.1-9ubuntu0.5",
"5.22.1-9ubuntu0.6",
"5.22.1-9ubuntu0.9",
"5.22.1-9ubuntu0.9+esm1",
"5.22.1-9ubuntu0.9+esm2",
"5.22.1-9ubuntu0.9+esm3",
"5.22.1-9ubuntu0.9+esm4"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libperl5.26",
"binary_version": "5.26.1-6ubuntu0.7+esm4"
},
{
"binary_name": "perl",
"binary_version": "5.26.1-6ubuntu0.7+esm4"
},
{
"binary_name": "perl-base",
"binary_version": "5.26.1-6ubuntu0.7+esm4"
},
{
"binary_name": "perl-debug",
"binary_version": "5.26.1-6ubuntu0.7+esm4"
},
{
"binary_name": "perl-modules-5.26",
"binary_version": "5.26.1-6ubuntu0.7+esm4"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "perl",
"purl": "pkg:deb/ubuntu/perl@5.26.1-6ubuntu0.7+esm4?arch=source\u0026distro=esm-infra/bionic"
},
"ranges": [
{
"events": [
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}
],
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}
],
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"5.26.1-2ubuntu1",
"5.26.1-3",
"5.26.1-4",
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"5.26.1-5",
"5.26.1-6",
"5.26.1-6ubuntu0.1",
"5.26.1-6ubuntu0.2",
"5.26.1-6ubuntu0.3",
"5.26.1-6ubuntu0.5",
"5.26.1-6ubuntu0.6",
"5.26.1-6ubuntu0.7",
"5.26.1-6ubuntu0.7+esm2",
"5.26.1-6ubuntu0.7+esm3",
"5.26.1-6ubuntu0.7+esm4"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libperl5.30",
"binary_version": "5.30.0-9ubuntu0.5+esm4"
},
{
"binary_name": "perl",
"binary_version": "5.30.0-9ubuntu0.5+esm4"
},
{
"binary_name": "perl-base",
"binary_version": "5.30.0-9ubuntu0.5+esm4"
},
{
"binary_name": "perl-debug",
"binary_version": "5.30.0-9ubuntu0.5+esm4"
},
{
"binary_name": "perl-modules-5.30",
"binary_version": "5.30.0-9ubuntu0.5+esm4"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "perl",
"purl": "pkg:deb/ubuntu/perl@5.30.0-9ubuntu0.5+esm4?arch=source\u0026distro=esm-infra/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.28.1-6build1",
"5.30.0-7",
"5.30.0-9",
"5.30.0-9build1",
"5.30.0-9ubuntu0.2",
"5.30.0-9ubuntu0.3",
"5.30.0-9ubuntu0.4",
"5.30.0-9ubuntu0.5",
"5.30.0-9ubuntu0.5+esm2",
"5.30.0-9ubuntu0.5+esm3",
"5.30.0-9ubuntu0.5+esm4"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libperl5.34",
"binary_version": "5.34.0-3ubuntu1.9"
},
{
"binary_name": "perl",
"binary_version": "5.34.0-3ubuntu1.9"
},
{
"binary_name": "perl-base",
"binary_version": "5.34.0-3ubuntu1.9"
},
{
"binary_name": "perl-debug",
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},
{
"binary_name": "perl-modules-5.34",
"binary_version": "5.34.0-3ubuntu1.9"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "perl",
"purl": "pkg:deb/ubuntu/perl@5.34.0-3ubuntu1.9?arch=source\u0026distro=jammy"
},
"ranges": [
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}
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"5.34.0-3ubuntu1.1",
"5.34.0-3ubuntu1.2",
"5.34.0-3ubuntu1.3",
"5.34.0-3ubuntu1.4",
"5.34.0-3ubuntu1.5",
"5.34.0-3ubuntu1.7",
"5.34.0-3ubuntu1.8",
"5.34.0-3ubuntu1.9"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libperl5.38t64",
"binary_version": "5.38.2-3.2ubuntu0.6"
},
{
"binary_name": "perl",
"binary_version": "5.38.2-3.2ubuntu0.6"
},
{
"binary_name": "perl-base",
"binary_version": "5.38.2-3.2ubuntu0.6"
},
{
"binary_name": "perl-debug",
"binary_version": "5.38.2-3.2ubuntu0.6"
},
{
"binary_name": "perl-modules-5.38",
"binary_version": "5.38.2-3.2ubuntu0.6"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "perl",
"purl": "pkg:deb/ubuntu/perl@5.38.2-3.2ubuntu0.6?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.36.0-9ubuntu1",
"5.36.0-10ubuntu1",
"5.38.2-3",
"5.38.2-3.2",
"5.38.2-3.2build1",
"5.38.2-3.2build2",
"5.38.2-3.2build2.1",
"5.38.2-3.2ubuntu0.1",
"5.38.2-3.2ubuntu0.2",
"5.38.2-3.2ubuntu0.3",
"5.38.2-3.2ubuntu0.4",
"5.38.2-3.2ubuntu0.6"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libperl5.40",
"binary_version": "5.40.1-7ubuntu0.3"
},
{
"binary_name": "perl",
"binary_version": "5.40.1-7ubuntu0.3"
},
{
"binary_name": "perl-base",
"binary_version": "5.40.1-7ubuntu0.3"
},
{
"binary_name": "perl-debug",
"binary_version": "5.40.1-7ubuntu0.3"
},
{
"binary_name": "perl-modules-5.40",
"binary_version": "5.40.1-7ubuntu0.3"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "perl",
"purl": "pkg:deb/ubuntu/perl@5.40.1-7ubuntu0.3?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.40.1-6build1",
"5.40.1-7build1",
"5.40.1-7ubuntu0.1",
"5.40.1-7ubuntu0.2",
"5.40.1-7ubuntu0.3"
]
}
],
"aliases": [],
"details": "Mojolicious is a real-time web framework for Perl. Prior to 9.48, the Mojolicious CSRF helpers csrf_field, csrf_token, and csrf_protect reuse an unchanged per-session token in rendered HTML. When response compression is enabled and attacker-influenced content is reflected in the same response, an unauthenticated attacker who can induce many victim requests and observe response sizes can use a BREACH compression side channel to recover the token and forge cross-site requests. API-only deployments that never render the token in HTML are not affected. This issue is fixed in version 9.48.",
"id": "UBUNTU-CVE-2026-77568",
"modified": "2026-09-21T00:00:00Z",
"published": "2026-09-21T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-77568"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-77568"
},
{
"type": "REPORT",
"url": "https://github.com/mojolicious/mojo/commit/01921fbbbbeca2d1397e082d4a647f9b84c24e27"
},
{
"type": "REPORT",
"url": "https://github.com/mojolicious/mojo/security/advisories/GHSA-cf46-h6jw-mj3r"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-77568"
],
"withdrawn": "2026-09-23T23:35:44Z"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
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- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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