GHSA-xjhr-fm27-4hmx

Suggest an improvement
Source
https://github.com/advisories/GHSA-xjhr-fm27-4hmx
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-xjhr-fm27-4hmx/GHSA-xjhr-fm27-4hmx.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-xjhr-fm27-4hmx
Aliases
Published
2026-02-25T18:31:38Z
Modified
2026-09-10T03:50:36Z
Severity
  • 4.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Summary
OpenFUN Richie Observable Timing Discrepancy in its sync_course_run_from_request function
Details

An issue in OpenFUN Richie (LMS) in src/richie/apps/courses/api.py. The application used the non-constant time == operator for HMAC signature verification in the sync_course_run_from_request function. This allows remote attackers to forge valid signatures and bypass authentication by measuring response time discrepancies.

Database specific 
{
    "cwe_ids":  [
        "CWE-208"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-02-26T22:50:20Z",
    "nvd_published_at":  "2026-02-25T17:25:39Z",
    "severity":  "MODERATE"
}
References

Affected packages

PyPI / richie

Package

Name
richie
View open source insights on deps.dev
Purl
pkg:pypi/richie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.3.0

Affected versions

0.*
0.1.0
1.*
1.0.0b0
1.0.0b1
1.0.0b2
1.0.0b3
1.0.0b4
1.0.0b5
1.0.0b6
1.0.0b7
1.0.0b8
1.0.0b9
1.0.0
1.0.1
1.1.0
1.2.0
1.3.0
1.4.0
1.4.1
1.5.0
1.5.1
1.5.2
1.6.0
1.6.1
1.7.0
1.7.1
1.7.2
1.7.3
1.8.0
1.8.1
1.8.2
1.8.3
1.9.0
1.9.1
1.9.2
1.10.0
1.11.0
1.12.0
1.12.1
1.13.0
1.14.0
1.14.1
1.15.0
1.16.0
1.16.1
1.16.2
1.17.0
2.*
2.0.0b0
2.0.0b1
2.0.0b2
2.0.0b3
2.0.0b4
2.0.0b5
2.0.0b6
2.0.0b7
2.0.0b8
2.0.0b9
2.0.0b11
2.0.0b12
2.0.0b13
2.0.0b14
2.0.0b15
2.0.0b16
2.0.0b17
2.0.0b18
2.0.0b19
2.0.0b20
2.0.0b21
2.0.0b22
2.0.0
2.0.1
2.1.0
2.2.0
2.3.0
2.3.1
2.3.2
2.3.3
2.4.0
2.5.0
2.6.0
2.7.0
2.7.1
2.8.0
2.8.1
2.8.2
2.9.0
2.9.1
2.10.0
2.11.0
2.12.0
2.13.0
2.14.0
2.14.1
2.15.0
2.15.1
2.16.0
2.17.0
2.18.0
2.19.0
2.20.0
2.20.1
2.21.0
2.21.1
2.22.0
2.23.0
2.24.0
2.24.1
2.25.0
2.25.1
2.26.0
2.27.0
2.28.0
2.28.1
2.29.0
2.29.1
2.29.2
2.30.0
2.31.0
2.32.0
2.33.0
2.34.0
3.*
3.0.0b0
3.0.0
3.1.0
3.1.1
3.1.2
3.2.0
3.2.1

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-xjhr-fm27-4hmx/GHSA-xjhr-fm27-4hmx.json"