CVE-2026-32597 (GCVE-0-2026-32597)

Vulnerability from cvelistv5 – Published: 2026-03-12 21:41 – Updated: 2026-06-30 03:17
VLAI
Title
PyJWT accepts unknown `crit` header extensions (RFC 7515 §4.1.11 MUST violation)
Summary
PyJWT is a JSON Web Token implementation in Python. Prior to 2.12.0, PyJWT does not validate the crit (Critical) Header Parameter defined in RFC 7515 §4.1.11. When a JWS token contains a crit array listing extensions that PyJWT does not understand, the library accepts the token instead of rejecting it. This violates the MUST requirement in the RFC. This vulnerability is fixed in 2.12.0.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-345 - Insufficient Verification of Data Authenticity
  • CWE-863 - Incorrect Authorization
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
URL Tags
https://github.com/jpadilla/pyjwt/security/adviso… x_refsource_CONFIRM
https://lists.debian.org/debian-lts-announce/2026…
https://access.redhat.com/security/cve/CVE-2026-32597 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2447194 issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v… x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:13512 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:13508 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:17083 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:13916 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19138 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:12176 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:22330 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:21517 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:21431 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:13672 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19355 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:8748 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:8746 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:8747 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:13553 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:13545 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:10140 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:10141 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:10184 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24977 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19712 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6720 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6568 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19375 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6912 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6926 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26226 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:8437 vendor-advisoryx_refsource_REDHAT
Impacted products
Vendor Product Version
jpadilla pyjwt Affected: < 2.12.0
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Red Hat Red Hat Ansible Automation Platform 2.5 for RHEL 8     cpe:/a:redhat:ansible_automation_platform:2.5::el8
    cpe:/a:redhat:ansible_automation_platform_developer:2.5::el8
    cpe:/a:redhat:ansible_automation_platform_inside:2.5::el8
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Red Hat Red Hat Ansible Automation Platform 2.5 for RHEL 9     cpe:/a:redhat:ansible_automation_platform:2.5::el9
    cpe:/a:redhat:ansible_automation_platform_developer:2.5::el9
    cpe:/a:redhat:ansible_automation_platform_inside:2.5::el9
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Red Hat Red Hat Ansible Automation Platform 2.6 for RHEL 9     cpe:/a:redhat:ansible_automation_platform:2.6::el9
    cpe:/a:redhat:ansible_automation_platform_developer:2.6::el9
    cpe:/a:redhat:ansible_automation_platform_inside:2.6::el9
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Red Hat Red Hat Enterprise Linux AppStream EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux AppStream (v. 10)     cpe:/o:redhat:enterprise_linux:10.1
    cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux AppStream (v. 8)     cpe:/a:redhat:enterprise_linux:8::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.2)     cpe:/a:redhat:rhel_e4s:9.2::appstream
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Red Hat Red Hat Enterprise Linux AppStream EUS (v.9.4)     cpe:/a:redhat:rhel_eus:9.4::appstream
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Red Hat Red Hat Enterprise Linux AppStream EUS (v.9.6)     cpe:/a:redhat:rhel_eus:9.6::appstream
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Red Hat Red Hat Enterprise Linux AppStream (v. 9)     cpe:/a:redhat:enterprise_linux:9::appstream
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Red Hat Red Hat Enterprise Linux HighAvailability (v. 8)     cpe:/a:redhat:enterprise_linux:8::highavailability
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Red Hat Red Hat Enterprise Linux High Availability E4S (v.9.2)     cpe:/a:redhat:rhel_e4s:9.2::highavailability
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Red Hat Red Hat Enterprise Linux High Availability EUS (v.9.4)     cpe:/a:redhat:rhel_eus:9.4::highavailability
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Red Hat Red Hat AI Inference Server 3.3     cpe:/a:redhat:ai_inference_server:3.3::el9
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Red Hat Red Hat Ansible Automation Platform 2.5     cpe:/a:redhat:ansible_automation_platform:2.5::el8
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Red Hat Red Hat Ansible Automation Platform 2.6     cpe:/a:redhat:ansible_automation_platform:2.6::el9
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Red Hat Red Hat Enterprise Linux AI 3.3     cpe:/a:redhat:enterprise_linux_ai:3.3::el9
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Red Hat Red Hat OpenShift AI 2.25     cpe:/a:redhat:openshift_ai:2.25::el9
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Red Hat Red Hat OpenShift AI 3.3     cpe:/a:redhat:openshift_ai:3.3::el9
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Red Hat Red Hat Quay 3.12     cpe:/a:redhat:quay:3.12::el8
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Red Hat Red Hat Quay 3.15     cpe:/a:redhat:quay:3.15::el8
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Red Hat Red Hat Quay 3.16     cpe:/a:redhat:quay:3.16::el9
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Red Hat Red Hat Quay 3.1     cpe:/a:redhat:quay:3.10::el8
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Red Hat Red Hat Quay 3.9     cpe:/a:redhat:quay:3.9::el8
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Red Hat Red Hat Satellite 6.18     cpe:/a:redhat:satellite:6.18::el9
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Red Hat Red Hat Trusted Artifact Signer 1.4     cpe:/a:redhat:trusted_artifact_signer:1.4::el9
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Red Hat Red Hat Enterprise Linux ResilientStorage (v. 8)     cpe:/a:redhat:enterprise_linux:8::resilientstorage
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Red Hat Red Hat Enterprise Linux Resilient Storage E4S (v.9.2)     cpe:/a:redhat:rhel_e4s:9.2::resilientstorage
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Red Hat Red Hat Enterprise Linux Resilient Storage EUS (v.9.4)     cpe:/a:redhat:rhel_eus:9.4::resilientstorage
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Red Hat OpenShift Lightspeed     cpe:/a:redhat:openshift_lightspeed
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Red Hat Red Hat AI Inference Server     cpe:/a:redhat:ai_inference_server:3
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Red Hat Red Hat Ansible Automation Platform 2     cpe:/a:redhat:ansible_automation_platform:2
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Red Hat Red Hat OpenShift AI (RHOAI)     cpe:/a:redhat:openshift_ai
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Red Hat Red Hat Satellite 6     cpe:/a:redhat:satellite:6
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Red Hat Red Hat Trusted Artifact Signer     cpe:/a:redhat:trusted_artifact_signer:1
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Red Hat Red Hat Ansible Automation Platform 2.6 for RHEL 10     cpe:/a:redhat:ansible_automation_platform:2.6::el10
    cpe:/a:redhat:ansible_automation_platform_developer:2.6::el10
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Show details on NVD website
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              "cpe:/a:redhat:enterprise_linux_ai:3.3::el9"
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            "cpes": [
              "cpe:/a:redhat:openshift_ai:2.25::el9"
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              "cpe:/a:redhat:openshift_ai:3.3::el9"
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              "cpe:/a:redhat:quay:3.15::el8"
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            "cpes": [
              "cpe:/a:redhat:openshift_lightspeed"
            ],
            "defaultStatus": "affected",
            "product": "OpenShift Lightspeed",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:ai_inference_server:3"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat AI Inference Server",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:ansible_automation_platform:2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Ansible Automation Platform 2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift_ai"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift AI (RHOAI)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:satellite:6"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Satellite 6",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:trusted_artifact_signer:1"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Trusted Artifact Signer",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
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              "cpe:/a:redhat:ansible_automation_platform_developer:2.6::el10"
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            "defaultStatus": "unaffected",
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            "vendor": "Red Hat"
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        ],
        "datePublic": "2026-03-12T21:41:50.427Z",
        "descriptions": [
          {
            "lang": "en",
            "value": "A missing verification step has been discovered in PyJWT. PyJWT does not validate the crit (Critical) Header Parameter defined in RFC 7515 \u00a74.1.11. When a JWS token contains a crit array listing extensions that PyJWT does not understand, the library accepts the token instead of rejecting it. This violates the MUST requirement in the RFC."
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
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                "value": "Important"
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              "type": "Red Hat severity rating"
            }
          },
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
              "version": "3.1"
            },
            "format": "CVSS"
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-347",
                "description": "Improper Verification of Cryptographic Signature",
                "lang": "en",
                "type": "CWE"
              }
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        ],
        "providerMetadata": {
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          "shortName": "redhat-SADP"
        },
        "references": [
          {
            "tags": [
              "vdb-entry",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2026-32597"
          },
          {
            "name": "RHBZ#2447194",
            "tags": [
              "issue-tracking",
              "x_refsource_REDHAT"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2447194"
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          {
            "tags": [
              "x_sadp-csaf-vex"
            ],
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32597.json"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:13512"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
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          },
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}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.