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CVE-2026-15747

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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7246a36b5f10084c568ce950d6749a32c4507aa85dd28e93fad1d6e4a2929167
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-352","description":"CWE-352 Cross-Site Request Forgery (CSRF)","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:93757854fe59fb2b1e756f96e3fbaf34812e0ac53115301d63261637cc0ff6b6 · sha256:da996b59af0be6a7… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-204","description":"CWE-204 Observable Response Discrepancy","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:93757854fe59fb2b1e756f96e3fbaf34812e0ac53115301d63261637cc0ff6b6 · sha256:da996b59af0be6a7… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"collectionURL":"https://cpan.org/modules","defaultStatus":"unaffected","packageName":"Mojolicious","product":"Mojolicious","programFiles":["lib/Mojolicious/Plugin/DefaultHelpers.pm","lib/Mojolicious/Plugin/TagHelpers.pm","lib/Mojolicious/Renderer.pm"],"programRoutines":[{"name":"Mojolicious::Plugin::DefaultHelpers::_csrf_token"}],"repo":"https://github.com/mojolicious/mojo","vendor":"SRI","versions":[{"lessThan":"9.48","status":"affected","version":"4.59","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:93757854fe59fb2b1e756f96e3fbaf34812e0ac53115301d63261637cc0ff6b6 · sha256:da996b59af0be6a7… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:93757854fe59fb2b1e756f96e3fbaf34812e0ac53115301d63261637cc0ff6b6 · sha256:da996b59af0be6a7… · /containers/adp/1/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-352","description":"CWE-352 Cross-Site Request Forgery (CSRF)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:93757854fe59fb2b1e756f96e3fbaf34812e0ac53115301d63261637cc0ff6b6 · sha256:da996b59af0be6a7… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-204","description":"CWE-204 Observable Response Discrepancy","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:93757854fe59fb2b1e756f96e3fbaf34812e0ac53115301d63261637cc0ff6b6 · sha256:da996b59af0be6a7… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/07/14/16"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:93757854fe59fb2b1e756f96e3fbaf34812e0ac53115301d63261637cc0ff6b6 · sha256:da996b59af0be6a7… · /containers/adp/0/references/0
{"tags":["patch"],"url":"https://github.com/mojolicious/mojo/commit/01921fbbbbeca2d1397e082d4a647f9b84c24e27.patch"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:93757854fe59fb2b1e756f96e3fbaf34812e0ac53115301d63261637cc0ff6b6 · sha256:da996b59af0be6a7… · /containers/cna/references/0
{"tags":["release-notes"],"url":"https://metacpan.org/release/SRI/Mojolicious-9.48/changes"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:93757854fe59fb2b1e756f96e3fbaf34812e0ac53115301d63261637cc0ff6b6 · sha256:da996b59af0be6a7… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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