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.

The remote openSUSE 16 host has a package installed that is affected by a vulnerability as referenced in the openSUSE- SU-2026:21496-1 advisory.

    Changes in perl-Mojolicious:

    - updated to 9.480.0 (9.48)
        - Fixed a security issue where CSRF tokens were vulnerable to BREACH attacks. Tokens are now masked     with a fresh           random value on every request, instead of being reused for the whole lifetime of a session.
          CVE-2026-15747 bsc#1271431

    - updated to 9.470.0 (9.47)
        - Added support for the QUERY HTTP request method from RFC 10008.
        - Added query and query_p methods to Mojo::UserAgent.
        - Added query method to Mojolicious::Routes::Route.
        - Added query method to Mojolicious::Lite.
        - Added query_ok method to Test::Mojo.
        - Fixed a security issue where the pure-Perl implementation of Mojo::JSON could exhaust all available     memory when           decoding deeply nested data. Decoding is now limited to 512 levels of nesting, to match the default     of           Cpanel::JSON::XS.
        - Fixed a memory leak in Morbo. (heikojansen)
        - Fixed Mojo::File::list_tree to no longer follow symbolic links to directories.

    - updated to 9.460.0 (9.46)
        - Added random_bytes function to Mojo::Util. (leont)
        - Improved randomness for CSRF token generation. (leont)
        - Fixed tls_options handling in Mojo::IOLoop::TLS. (krauro)
        - Fixed spec compliance issue with attribute selectors in Mojo::DOM::CSS.

    - updated to 9.450.0 (9.45)
        - Fixed portability issue in WebSocket tests.
        - Fixed various spec compliance issues in Mojo::DOM.
        - Fixed permessage-deflate support in Mojo::Transaction::WebSocket to be more interoperable with non-     spec compliant           implementations.
        - Fixed punycode roundtrip bug in Mojo::Util.
        - Fixed Windows compatibility issues of Mojo::File::list_tree.

    - updated to 9.420.0 (9.42)
        - Un-deprecated the spurt method in Mojo::File, it is now an alternative to spew.
        - Removed experimental status from top-level await support in Mojo::Promise.
        - Removed experimental status from encrypted session cookie support.
        - Removed experimental status from persistent cookie support.
        - Removed experimental status from samesite cookie support.
        - Removed experimental status from colourful log messages.
        - Removed experimental status from freeze option in Mojo::IOLoop.
        - Removed experimental status from check and raise functions in Mojo::Exception.
        - Fixed Cpanel::JSON::XS compatibility issues. (ilmari)
        - Fixed async/await memory leak in Mojo::Promise. (TFBW)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has a package installed that is affected by a vulnerability as referenced in the openSUSE- SU-2026:21451-1 advisory.

    Changes in perl-Mojolicious:

    - updated to 9.480.0 (9.48)
        - Fixed a security issue where CSRF tokens were vulnerable to BREACH attacks. Tokens are now masked     with a fresh           random value on every request, instead of being reused for the whole lifetime of a session.
          CVE-2026-15747 bsc#1271431

    - updated to 9.470.0 (9.47)
        - Added support for the QUERY HTTP request method from RFC 10008.
        - Added query and query_p methods to Mojo::UserAgent.
        - Added query method to Mojolicious::Routes::Route.
        - Added query method to Mojolicious::Lite.
        - Added query_ok method to Test::Mojo.
        - Fixed a security issue where the pure-Perl implementation of Mojo::JSON could exhaust all available     memory when           decoding deeply nested data. Decoding is now limited to 512 levels of nesting, to match the default     of           Cpanel::JSON::XS.
        - Fixed a memory leak in Morbo. (heikojansen)
        - Fixed Mojo::File::list_tree to no longer follow symbolic links to directories.

    - updated to 9.460.0 (9.46)
        - Added random_bytes function to Mojo::Util. (leont)
        - Improved randomness for CSRF token generation. (leont)
        - Fixed tls_options handling in Mojo::IOLoop::TLS. (krauro)
        - Fixed spec compliance issue with attribute selectors in Mojo::DOM::CSS.

    - updated to 9.450.0 (9.45)
        - Fixed portability issue in WebSocket tests.
        - Fixed various spec compliance issues in Mojo::DOM.
        - Fixed permessage-deflate support in Mojo::Transaction::WebSocket to be more interoperable with non-     spec compliant           implementations.
        - Fixed punycode roundtrip bug in Mojo::Util.
        - Fixed Windows compatibility issues of Mojo::File::list_tree.

    - updated to 9.420.0 (9.42)
        - Un-deprecated the spurt method in Mojo::File, it is now an alternative to spew.
        - Removed experimental status from top-level await support in Mojo::Promise.
        - Removed experimental status from encrypted session cookie support.
        - Removed experimental status from persistent cookie support.
        - Removed experimental status from samesite cookie support.
        - Removed experimental status from colourful log messages.
        - Removed experimental status from freeze option in Mojo::IOLoop.
        - Removed experimental status from check and raise functions in Mojo::Exception.
        - Fixed Cpanel::JSON::XS compatibility issues. (ilmari)
        - Fixed async/await memory leak in Mojo::Promise. (TFBW)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-6f12b08313 advisory.

    Mojolicious 9.48 fixes a security issue where CSRF tokens were vulnerable to BREACH attacks. Tokens are     now masked with a fresh random value on every request, instead of being reused for the whole lifetime of a     session.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-4334fd85bc advisory.

    Mojolicious 9.48 fixes a security issue where CSRF tokens were vulnerable to BREACH attacks. Tokens are     now masked with a fresh random value on every request, instead of being reused for the whole lifetime of a     session.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-15747)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
331563	openSUSE 16 Security Update : perl-Mojolicious (openSUSE-SU-2026:21496-1)	Nessus	SuSE Local Security Checks	critical
330585	openSUSE 16 Security Update : perl-Mojolicious (openSUSE-SU-2026:21451-1)	Nessus	SuSE Local Security Checks	critical
330302	Fedora 43 : perl-Mojolicious (2026-6f12b08313)	Nessus	Fedora Local Security Checks	critical
330253	Fedora 44 : perl-Mojolicious (2026-4334fd85bc)	Nessus	Fedora Local Security Checks	critical
326913	Linux Distros Unpatched Vulnerability : CVE-2026-15747	Nessus	Misc.	critical

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