Red Hat Security Advisory: RHTAS 1.3.6 - Red Hat Trusted Artifact Signer Release
Affects Red HatSource GCVE Database
Not known to be exploited · CVSS 7.4 High : upgrade Red Hat pyjwt to 2.13.0 soon.
Data as of 6 Nov 2026, 00:51 UTC
- Patch
- Available – fixed in 2.13.0
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 28 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
Upgrade pyjwt to 2.13.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| jpadillapyjwt | Affected
| Fixed in
|
PyPIpyjwtpkg:pypi/pyjwtOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Red Hat has not indicated any available fix or patch for this vulnerability at this time. The advisory notes that affected products are only those using the specific non-standard verifier configuration. Users should review their JWT verification configurations to ensure they do not accept both symmetric and asymmetric algorithms simultaneously or use the issuer's public key as the HMAC secret. Monitoring Red Hat advisories for future patches or mitigations is recommended.
Description
CVE-2026-48526 is a vulnerability in the PyJWT Python library where improper validation of JSON Web Keys (JWK) in the HMAC algorithm allows an attacker to forge JSON Web Tokens (JWTs). This occurs when a JWT verifier is misconfigured to accept both symmetric and asymmetric algorithms, enabling the use of the issuer's public key as the HMAC secret key. This flaw can lead to authentication bypass and unauthorized access. Red Hat products are affected only if they use this specific non-standard verifier configuration.
References
- access.redhat.com/errata/RHSA-2026:40967 (opens in a new tab)
- access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.3 (opens in a new tab)
- access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.3/html-single/release_notes/index (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-48526 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_40967.json (opens in a new tab)