Mojolicious versions from 7.28 through 9.45 for Perl will generate weak HMAC session cookie secrets via "mojo generate app" by default.
When creating a default app skeleton with the "mojo generate app" tool, a weak secret is written to the application's configuration file using the insecure rand() function, and used for authenticating and protecting the integrity of the application's sessions. This may allow an attacker to brute force the application's session keys.
Release 9.46 fixes the issue by providing high quality randomness, even in absence of CryptX.
Users should be aware that the update does not replace previously generated weak secrets. A secret generated with the previous version MUST be replaced to ensure the updated version is using a strong secret.
When creating a default app skeleton with the "mojo generate app" tool, a weak secret is written to the application's configuration file using the insecure rand() function, and used for authenticating and protecting the integrity of the application's sessions. This may allow an attacker to brute force the application's session keys.
Release 9.46 fixes the issue by providing high quality randomness, even in absence of CryptX.
Users should be aware that the update does not replace previously generated weak secrets. A secret generated with the previous version MUST be replaced to ensure the updated version is using a strong secret.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| SRI | Mojolicious | unaffected |
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No data.
No data.
Advisories
| Source | ID | Title |
|---|---|---|
 EUVD |
EUVD-2025-13365 | Mojolicious versions from 7.28 through 9.39 for Perl may generate weak HMAC session secrets. When creating a default app with the "mojo generate app" tool, a weak secret is written to the application's configuration file using the insecure rand() function, and used for authenticating and protecting the integrity of the application's sessions. This may allow an attacker to brute force the application's session keys. |
Fixes
Solution
Upgrade to version 9.46 and replace previously generated secrets.
Workaround
Ensure that your secret, stored in the application's configuration file, is at least 128 bit of cryptographically secure random data. For example, to generate a 256 bit secret, one could use the output generated by the "openssl rand -base64 32" command.
References
History
Fri, 05 Jun 2026 13:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Mojolicious versions from 7.28 for Perl will generate weak HMAC session cookie secrets via "mojo generate app" by default When creating a default app skeleton with the "mojo generate app" tool, a weak secret is written to the application's configuration file using the insecure rand() function, and used for authenticating and protecting the integrity of the application's sessions. This may allow an attacker to brute force the application's session keys. | Mojolicious versions from 7.28 through 9.45 for Perl will generate weak HMAC session cookie secrets via "mojo generate app" by default. When creating a default app skeleton with the "mojo generate app" tool, a weak secret is written to the application's configuration file using the insecure rand() function, and used for authenticating and protecting the integrity of the application's sessions. This may allow an attacker to brute force the application's session keys. Release 9.46 fixes the issue by providing high quality randomness, even in absence of CryptX. Users should be aware that the update does not replace previously generated weak secrets. A secret generated with the previous version MUST be replaced to ensure the updated version is using a strong secret. |
| Title | Mojolicious versions from 7.28 for Perl will generate weak HMAC session cookie secrets via "mojo generate app" by default | Mojolicious versions from 7.28 through 9.45 for Perl will generate weak HMAC session cookie secrets via "mojo generate app" by default |
| References |
|
Mon, 20 Oct 2025 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Mojolicious versions from 7.28 through 9.40 for Perl may generate weak HMAC session secrets. When creating a default app with the "mojo generate app" tool, a weak secret is written to the application's configuration file using the insecure rand() function, and used for authenticating and protecting the integrity of the application's sessions. This may allow an attacker to brute force the application's session keys. | Mojolicious versions from 7.28 for Perl will generate weak HMAC session cookie secrets via "mojo generate app" by default When creating a default app skeleton with the "mojo generate app" tool, a weak secret is written to the application's configuration file using the insecure rand() function, and used for authenticating and protecting the integrity of the application's sessions. This may allow an attacker to brute force the application's session keys. |
| Title | Mojolicious versions from 7.28 through 9.40 for Perl may generate weak HMAC session secrets | Mojolicious versions from 7.28 for Perl will generate weak HMAC session cookie secrets via "mojo generate app" by default |
| References |
|
Tue, 17 Jun 2025 14:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mojolicious
Mojolicious mojolicious |
|
| CPEs | cpe:2.3:a:mojolicious:mojolicious:*:*:*:*:*:perl:*:* | |
| Vendors & Products |
Mojolicious
Mojolicious mojolicious |
Mon, 12 May 2025 18:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Mojolicious versions from 7.28 through 9.39 for Perl may generate weak HMAC session secrets. When creating a default app with the "mojo generate app" tool, a weak secret is written to the application's configuration file using the insecure rand() function, and used for authenticating and protecting the integrity of the application's sessions. This may allow an attacker to brute force the application's session keys. | Mojolicious versions from 7.28 through 9.40 for Perl may generate weak HMAC session secrets. When creating a default app with the "mojo generate app" tool, a weak secret is written to the application's configuration file using the insecure rand() function, and used for authenticating and protecting the integrity of the application's sessions. This may allow an attacker to brute force the application's session keys. |
| Title | Mojolicious versions from 7.28 through 9.39 for Perl may generate weak HMAC session secrets | Mojolicious versions from 7.28 through 9.40 for Perl may generate weak HMAC session secrets |
Thu, 08 May 2025 08:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Wed, 07 May 2025 19:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
cvssV3_1
|
Sat, 03 May 2025 10:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Mojolicious versions from 7.28 through 9.39 for Perl may generate weak HMAC session secrets. When creating a default app with the "mojo generate app" tool, a weak secret is written to the application's configuration file using the insecure rand() function, and used for authenticating and protecting the integrity of the application's sessions. This may allow an attacker to brute force the application's session keys. | |
| Title | Mojolicious versions from 7.28 through 9.39 for Perl may generate weak HMAC session secrets | |
| Weaknesses | CWE-338 | |
| References |
|
|
Projects
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MITRE
Status: PUBLISHED
Assigner: CPANSec
Published:
Updated: 2026-06-05T12:37:53.344Z
Reserved: 2025-04-07T16:06:37.226Z
Link: CVE-2024-58135
Vulnrichment
Updated: 2025-05-05T18:16:35.505Z
NVD
Status : Modified
Published: 2025-05-03T11:15:48.037
Modified: 2026-06-05T14:16:31.663
Link: CVE-2024-58135
Redhat
No data.
OpenCVE Enrichment
No data.
Weaknesses