01 Record
CVE-2026-54238
Supabase Realtime: Expired JWTs with string exp are accepted by REST broadcast authorization
LowPUBLISHEDCNA: GitHub_M
CNA base score3.1 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
02 Description
Supabase Realtime: Expired JWTs with string exp are accepted by REST broadcast authorization
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 0.20% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 10.7% of scored records. A rank, not a probability.
- NVD base score
- 3.1 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
- NVD analysis status
- Awaiting Analysis. NVD last modified this record on 2026-10-23.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-10-22 17:22Z6 DAYS AGO
- Last updated
- 2026-10-22 17:22Z6 DAYS AGO
- Reserved
- 2026-06-12
- Assigning CNA
- GitHub_M
- Record state
- PUBLISHED
- Severity
- Low (CVSS 3.1)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
- Weaknesses
- CWE-613Insufficient Session ExpirationBase
- Data version
- 5.2
- Document digest
- 2c8f145f6519e63654ba20fee83d6957f8371e85bd50d39d7539a48f69adceb2
05 Affected products
VendorProductVersionsPlatforms
06 References
- github.comhttps://github.com/supabase/realtime/security/advisories/GHSA-hg9h-6mhq-6c2v
- github.comhttps://github.com/supabase/realtime/pull/1934
- github.comhttps://github.com/supabase/realtime/commit/ac229d7eff2798b12b994e07bdd64f5e9b56374a
- github.comhttps://github.com/supabase/realtime/releases/tag/v2.103.1