01 Record
CVE-2026-48526
PyJWT: Public-key JWK accepted as HMAC secret enables forged HS256 tokens when mixed families are allowed
HighPUBLISHEDCNA: GitHub_M
CNA base score7.4 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
02 Description
PyJWT: Public-key JWK accepted as HMAC secret enables forged HS256 tokens when mixed families are allowed
03 Exploitation and scoring
- Exploitation
- Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.
- SSVC decision
- ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 0.42% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 36.6% of scored records. A rank, not a probability.
- NVD base score
- 7.4 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-10-26.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
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
- 2026-05-28 15:09Z5 MO AGO
- Last updated
- 2026-09-10 12:04Z1 MO AGO
- Reserved
- 2026-05-21
- Assigning CNA
- GitHub_M
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.4)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- Weaknesses
- Data version
- 5.2
- Document digest
- a13459e8ffec79ccef854bdbaabdbbbfa7fcf77f1cab37f2e2939a53da9165c5
05 Affected products
VendorProductVersionsPlatforms
06 References
- github.comhttps://github.com/jpadilla/pyjwt/security/advisories/GHSA-xgmm-8j9v-c9wx
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-48526
- bugzilla.redhat.comRHBZ#2482734https://bugzilla.redhat.com/show_bug.cgi?id=2482734
- security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48526.json
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:50319
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:50223
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:50336
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:34160
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:50222
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:50263
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:34365
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:35845
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:25902
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:35837
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:35836
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:35835
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:26206
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:30089
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:30088
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:42144
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:42132
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:34374
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:50340
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:25928
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:42142
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:43038
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:42644
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:37275
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:60520
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:33683
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:30076
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:42796
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:41066
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:48085
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:28571
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:36350
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:40967
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:50904
07 Fixed in
AlmaLinux 9
- fence-agents-aliyun Fixed in 4.10.0-110.el9_8.3
- fence-agents-all Fixed in 4.10.0-110.el9_8.3
- fence-agents-amt-ws Fixed in 4.10.0-110.el9_8.3
- fence-agents-apc Fixed in 4.10.0-110.el9_8.3
- fence-agents-apc-snmp Fixed in 4.10.0-110.el9_8.3
- fence-agents-aws Fixed in 4.10.0-110.el9_8.3
- fence-agents-azure-arm Fixed in 4.10.0-110.el9_8.3
- fence-agents-bladecenter Fixed in 4.10.0-110.el9_8.3
- fence-agents-brocade Fixed in 4.10.0-110.el9_8.3
- fence-agents-cisco-mds Fixed in 4.10.0-110.el9_8.3
- fence-agents-cisco-ucs Fixed in 4.10.0-110.el9_8.3
- fence-agents-common Fixed in 4.10.0-110.el9_8.3
- fence-agents-compute Fixed in 4.10.0-110.el9_8.3
- fence-agents-drac5 Fixed in 4.10.0-110.el9_8.3
- fence-agents-eaton-snmp Fixed in 4.10.0-110.el9_8.3
- fence-agents-emerson Fixed in 4.10.0-110.el9_8.3
- fence-agents-eps Fixed in 4.10.0-110.el9_8.3
- fence-agents-gce Fixed in 4.10.0-110.el9_8.3
- fence-agents-heuristics-ping Fixed in 4.10.0-110.el9_8.3
- fence-agents-hpblade Fixed in 4.10.0-110.el9_8.3
- fence-agents-ibm-powervs Fixed in 4.10.0-110.el9_8.3
- fence-agents-ibm-vpc Fixed in 4.10.0-110.el9_8.3
- fence-agents-ibmblade Fixed in 4.10.0-110.el9_8.3
- fence-agents-ifmib Fixed in 4.10.0-110.el9_8.3
- fence-agents-ilo-moonshot Fixed in 4.10.0-110.el9_8.3
- fence-agents-ilo-mp Fixed in 4.10.0-110.el9_8.3
- fence-agents-ilo-ssh Fixed in 4.10.0-110.el9_8.3
- fence-agents-ilo2 Fixed in 4.10.0-110.el9_8.3
- fence-agents-intelmodular Fixed in 4.10.0-110.el9_8.3
- fence-agents-ipdu Fixed in 4.10.0-110.el9_8.3
- fence-agents-ipmilan Fixed in 4.10.0-110.el9_8.3
- fence-agents-kdump Fixed in 4.10.0-110.el9_8.3
- fence-agents-kubevirt Fixed in 4.10.0-110.el9_8.3
- fence-agents-lpar Fixed in 4.10.0-110.el9_8.3
- fence-agents-mpath Fixed in 4.10.0-110.el9_8.3
- fence-agents-nutanix-ahv Fixed in 4.10.0-110.el9_8.3
- fence-agents-openstack Fixed in 4.10.0-110.el9_8.3
- fence-agents-redfish Fixed in 4.10.0-110.el9_8.3
- fence-agents-rhevm Fixed in 4.10.0-110.el9_8.3
- fence-agents-rsa Fixed in 4.10.0-110.el9_8.3
16 further packages in AlmaLinux 9 not shown (first 40 listed).
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 10
- fence-agents-aliyun Fixed in 4.16.0-21.el10_2.2
- fence-agents-all Fixed in 4.16.0-21.el10_2.2
- fence-agents-amt-ws Fixed in 4.16.0-21.el10_2.2
- fence-agents-apc Fixed in 4.16.0-21.el10_2.2
- fence-agents-apc-snmp Fixed in 4.16.0-21.el10_2.2
- fence-agents-aws Fixed in 4.16.0-21.el10_2.2
- fence-agents-azure-arm Fixed in 4.16.0-21.el10_2.2
- fence-agents-bladecenter Fixed in 4.16.0-21.el10_2.2
- fence-agents-brocade Fixed in 4.16.0-21.el10_2.2
- fence-agents-cisco-mds Fixed in 4.16.0-21.el10_2.2
- fence-agents-cisco-ucs Fixed in 4.16.0-21.el10_2.2
- fence-agents-common Fixed in 4.16.0-21.el10_2.2
- fence-agents-drac5 Fixed in 4.16.0-21.el10_2.2
- fence-agents-eaton-snmp Fixed in 4.16.0-21.el10_2.2
- fence-agents-emerson Fixed in 4.16.0-21.el10_2.2
- fence-agents-eps Fixed in 4.16.0-21.el10_2.2
- fence-agents-gce Fixed in 4.16.0-21.el10_2.2
- fence-agents-heuristics-ping Fixed in 4.16.0-21.el10_2.2
- fence-agents-hpblade Fixed in 4.16.0-21.el10_2.2
- fence-agents-ibm-powervs Fixed in 4.16.0-21.el10_2.2
- fence-agents-ibm-vpc Fixed in 4.16.0-21.el10_2.2
- fence-agents-ibmblade Fixed in 4.16.0-21.el10_2.2
- fence-agents-ifmib Fixed in 4.16.0-21.el10_2.2
- fence-agents-ilo-moonshot Fixed in 4.16.0-21.el10_2.2
- fence-agents-ilo-mp Fixed in 4.16.0-21.el10_2.2
- fence-agents-ilo-ssh Fixed in 4.16.0-21.el10_2.2
- fence-agents-ilo2 Fixed in 4.16.0-21.el10_2.2
- fence-agents-intelmodular Fixed in 4.16.0-21.el10_2.2
- fence-agents-ipdu Fixed in 4.16.0-21.el10_2.2
- fence-agents-ipmilan Fixed in 4.16.0-21.el10_2.2
- fence-agents-kdump Fixed in 4.16.0-21.el10_2.2
- fence-agents-kubevirt Fixed in 4.16.0-21.el10_2.2
- fence-agents-lpar Fixed in 4.16.0-21.el10_2.2
- fence-agents-mpath Fixed in 4.16.0-21.el10_2.2
- fence-agents-nutanix-ahv Fixed in 4.16.0-21.el10_2.2
- fence-agents-openstack Fixed in 4.16.0-21.el10_2.2
- fence-agents-redfish Fixed in 4.16.0-21.el10_2.2
- fence-agents-rhevm Fixed in 4.16.0-21.el10_2.2
- fence-agents-rsa Fixed in 4.16.0-21.el10_2.2
- fence-agents-rsb Fixed in 4.16.0-21.el10_2.2
15 further packages in AlmaLinux 10 not shown (first 40 listed).
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- fence-agents-aliyun Fixed in 4.10.0-110.el9_8.3
- fence-agents-all Fixed in 4.10.0-110.el9_8.3
- fence-agents-amt-ws Fixed in 4.10.0-110.el9_8.3
- fence-agents-apc Fixed in 4.10.0-110.el9_8.3
- fence-agents-apc-snmp Fixed in 4.10.0-110.el9_8.3
- fence-agents-aws Fixed in 4.10.0-110.el9_8.3
- fence-agents-azure-arm Fixed in 4.10.0-110.el9_8.3
- fence-agents-bladecenter Fixed in 4.10.0-110.el9_8.3
- fence-agents-brocade Fixed in 4.10.0-110.el9_8.3
- fence-agents-cisco-mds Fixed in 4.10.0-110.el9_8.3
- fence-agents-cisco-ucs Fixed in 4.10.0-110.el9_8.3
- fence-agents-common Fixed in 4.10.0-110.el9_8.3
- fence-agents-compute Fixed in 4.10.0-110.el9_8.3
- fence-agents-drac5 Fixed in 4.10.0-110.el9_8.3
- fence-agents-eaton-snmp Fixed in 4.10.0-110.el9_8.3
- fence-agents-emerson Fixed in 4.10.0-110.el9_8.3
- fence-agents-eps Fixed in 4.10.0-110.el9_8.3
- fence-agents-gce Fixed in 4.10.0-110.el9_8.3
- fence-agents-heuristics-ping Fixed in 4.10.0-110.el9_8.3
- fence-agents-hpblade Fixed in 4.10.0-110.el9_8.3
- fence-agents-ibm-powervs Fixed in 4.10.0-110.el9_8.3
- fence-agents-ibm-vpc Fixed in 4.10.0-110.el9_8.3
- fence-agents-ibmblade Fixed in 4.10.0-110.el9_8.3
- fence-agents-ifmib Fixed in 4.10.0-110.el9_8.3
- fence-agents-ilo-moonshot Fixed in 4.10.0-110.el9_8.3
- fence-agents-ilo-mp Fixed in 4.10.0-110.el9_8.3
- fence-agents-ilo-ssh Fixed in 4.10.0-110.el9_8.3
- fence-agents-ilo2 Fixed in 4.10.0-110.el9_8.3
- fence-agents-intelmodular Fixed in 4.10.0-110.el9_8.3
- fence-agents-ipdu Fixed in 4.10.0-110.el9_8.3
- fence-agents-ipmilan Fixed in 4.10.0-110.el9_8.3
- fence-agents-kdump Fixed in 4.10.0-110.el9_8.3
- fence-agents-kubevirt Fixed in 4.10.0-110.el9_8.3
- fence-agents-lpar Fixed in 4.10.0-110.el9_8.3
- fence-agents-mpath Fixed in 4.10.0-110.el9_8.3
- fence-agents-nutanix-ahv Fixed in 4.10.0-110.el9_8.3
- fence-agents-openstack Fixed in 4.10.0-110.el9_8.3
- fence-agents-redfish Fixed in 4.10.0-110.el9_8.3
- fence-agents-rhevm Fixed in 4.10.0-110.el9_8.3
- fence-agents-rsa Fixed in 4.10.0-110.el9_8.3
16 further packages in CloudLinux 9 not shown (first 40 listed).
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 10
- fence-agents-aliyun Fixed in 4.16.0-21.el10_2.2
- fence-agents-all Fixed in 4.16.0-21.el10_2.2
- fence-agents-amt-ws Fixed in 4.16.0-21.el10_2.2
- fence-agents-apc Fixed in 4.16.0-21.el10_2.2
- fence-agents-apc-snmp Fixed in 4.16.0-21.el10_2.2
- fence-agents-aws Fixed in 4.16.0-21.el10_2.2
- fence-agents-azure-arm Fixed in 4.16.0-21.el10_2.2
- fence-agents-bladecenter Fixed in 4.16.0-21.el10_2.2
- fence-agents-brocade Fixed in 4.16.0-21.el10_2.2
- fence-agents-cisco-mds Fixed in 4.16.0-21.el10_2.2
- fence-agents-cisco-ucs Fixed in 4.16.0-21.el10_2.2
- fence-agents-common Fixed in 4.16.0-21.el10_2.2
- fence-agents-drac5 Fixed in 4.16.0-21.el10_2.2
- fence-agents-eaton-snmp Fixed in 4.16.0-21.el10_2.2
- fence-agents-emerson Fixed in 4.16.0-21.el10_2.2
- fence-agents-eps Fixed in 4.16.0-21.el10_2.2
- fence-agents-gce Fixed in 4.16.0-21.el10_2.2
- fence-agents-heuristics-ping Fixed in 4.16.0-21.el10_2.2
- fence-agents-hpblade Fixed in 4.16.0-21.el10_2.2
- fence-agents-ibm-powervs Fixed in 4.16.0-21.el10_2.2
- fence-agents-ibm-vpc Fixed in 4.16.0-21.el10_2.2
- fence-agents-ibmblade Fixed in 4.16.0-21.el10_2.2
- fence-agents-ifmib Fixed in 4.16.0-21.el10_2.2
- fence-agents-ilo-moonshot Fixed in 4.16.0-21.el10_2.2
- fence-agents-ilo-mp Fixed in 4.16.0-21.el10_2.2
- fence-agents-ilo-ssh Fixed in 4.16.0-21.el10_2.2
- fence-agents-ilo2 Fixed in 4.16.0-21.el10_2.2
- fence-agents-intelmodular Fixed in 4.16.0-21.el10_2.2
- fence-agents-ipdu Fixed in 4.16.0-21.el10_2.2
- fence-agents-ipmilan Fixed in 4.16.0-21.el10_2.2
- fence-agents-kdump Fixed in 4.16.0-21.el10_2.2
- fence-agents-kubevirt Fixed in 4.16.0-21.el10_2.2
- fence-agents-lpar Fixed in 4.16.0-21.el10_2.2
- fence-agents-mpath Fixed in 4.16.0-21.el10_2.2
- fence-agents-nutanix-ahv Fixed in 4.16.0-21.el10_2.2
- fence-agents-openstack Fixed in 4.16.0-21.el10_2.2
- fence-agents-redfish Fixed in 4.16.0-21.el10_2.2
- fence-agents-rhevm Fixed in 4.16.0-21.el10_2.2
- fence-agents-rsa Fixed in 4.16.0-21.el10_2.2
- fence-agents-rsb Fixed in 4.16.0-21.el10_2.2
15 further packages in CloudLinux 10 not shown (first 40 listed).
Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- pyjwt No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- pyjwt No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- pyjwt Fixed in 2.13.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- pyjwt Fixed in 2.3.0-1ubuntu0.4
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- pyjwt Fixed in 2.7.0-1ubuntu0.2
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- pyjwt No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- pyjwt Fixed in 2.10.1-4ubuntu1.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- pyjwt Fixed in 1.3.0-1ubuntu0.1+esm2Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- pyjwt Fixed in 1.5.3+ds1-1ubuntu0.1+esm2Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- pyjwt Fixed in 1.7.1-2ubuntu2.1+esm2Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.