Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-32874

A flaw was found in UltraJSON, a fast JSON encoder and decoder. A remote attacker can exploit this vulnerability by providing specially crafted JSON input that contains extremely large integers. When UltraJSON attempts to parse these inputs, it leads to an accumulating memory leak. This excessive memory consumption can ultimately result in a denial of service (DoS) for any service that processes untrusted JSON inputs using UltraJSON.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:79585ee59c1851601ca4442bc237208bcb25b4c1e4aeb666e701b5fdc1cdccf1
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 4 assertions

{"product":"ultrajson","vendor":"ultrajson","versions":[{"status":"affected","version":">= 5.4.0, < 5.12.0"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/cna/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openstack:18.0"],"defaultStatus":"unaffected","packageName":"python-ujson","product":"Red Hat OpenStack Platform 18.0","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/adp/1/affected/2

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openstack:16.2"],"defaultStatus":"unaffected","packageName":"python-ujson","product":"Red Hat OpenStack Platform 16.2","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/adp/1/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openstack:17.1"],"defaultStatus":"unaffected","packageName":"python-ujson","product":"Red Hat OpenStack Platform 17.1","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/adp/1/affected/1
cwe · 2 assertions

{"cweId":"CWE-401","description":"CWE-401: Missing Release of Memory after Effective Lifetime","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-772","description":"Missing Release of Resource after Effective Lifetime","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/adp/1/problemTypes/0/descriptions/0

Affected products and versions

4 source assertions
{"product":"ultrajson","vendor":"ultrajson","versions":[{"status":"affected","version":">= 5.4.0, < 5.12.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/cna/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openstack:18.0"],"defaultStatus":"unaffected","packageName":"python-ujson","product":"Red Hat OpenStack Platform 18.0","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/adp/1/affected/2
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openstack:16.2"],"defaultStatus":"unaffected","packageName":"python-ujson","product":"Red Hat OpenStack Platform 16.2","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/adp/1/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openstack:17.1"],"defaultStatus":"unaffected","packageName":"python-ujson","product":"Red Hat OpenStack Platform 17.1","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/adp/1/affected/1

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/adp/1/metrics/1/cvssV3_1
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-401","description":"CWE-401: Missing Release of Memory after Effective Lifetime","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-772","description":"Missing Release of Resource after Effective Lifetime","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/adp/1/problemTypes/0/descriptions/0

Source references

6 source assertions
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-32874"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/adp/1/references/0
{"name":"RHBZ#2449411","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2449411"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/adp/1/references/1
{"name":"https://github.com/ultrajson/ultrajson/commit/4baeb950df780092bd3c89fc702a868e99a3a1d2","tags":["x_refsource_MISC"],"url":"https://github.com/ultrajson/ultrajson/commit/4baeb950df780092bd3c89fc702a868e99a3a1d2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/cna/references/1
{"name":"https://github.com/ultrajson/ultrajson/releases/tag/5.12.0","tags":["x_refsource_MISC"],"url":"https://github.com/ultrajson/ultrajson/releases/tag/5.12.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/cna/references/2
{"name":"https://github.com/ultrajson/ultrajson/security/advisories/GHSA-wgvc-ghv9-3pmm","tags":["x_refsource_CONFIRM"],"url":"https://github.com/ultrajson/ultrajson/security/advisories/GHSA-wgvc-ghv9-3pmm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/cna/references/0
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32874.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d5049d18791c0da1e5c7b58c9196567723cb5e66d03c4f015eed80f6fa3d1534 · sha256:20adc532778301c2… · /containers/adp/1/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

← Back to CVE Explorer