Red Hat Security Advisory: RHTAS 1.4 - GA Release of Model Transparency 1.0.3
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 30 Oct 2026, 10:00 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 29 Oct 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 advises that only products using the specific non-standard verifier configuration are affected. 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 an HMAC secret. Customers with Red Hat Technical Account Managers can seek direct guidance.
Description
A vulnerability in the PyJWT library used by Red Hat Trusted Artifact Signer (RHTAS) allows an attacker to forge JSON Web Tokens (JWTs) by exploiting improper validation of JSON Web Keys (JWK) when both symmetric (HMAC) and asymmetric algorithms are accepted. This can lead to authentication bypass and unauthorized access if the verifier is misconfigured to accept the issuer's public key as the HMAC secret. Red Hat products are affected only if they use this specific non-standard verifier configuration.
References
- access.redhat.com/errata/RHSA-2026:50904 (opens in a new tab)
- access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4 (opens in a new tab)
- access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4/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/cve/CVE-2026-59886 (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_50904.json (opens in a new tab)