CVE-2026-33816 (GCVE-0-2026-33816)

Vulnerability from cvelistv5 – Published: 2026-04-07 15:19 – Updated: 2026-07-09 12:10
VLAI
Title
CVE-2026-33816 in github.com/jackc/pgx
Summary
Memory-safety vulnerability in github.com/jackc/pgx/v5.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.3 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
Go
References
URL Tags
https://pkg.go.dev/vuln/GO-2026-4772
https://access.redhat.com/security/cve/CVE-2026-33816 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2455972 issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v… x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:17789 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36796 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19137 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26636 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:22423 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24503 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24539 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25273 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:13829 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:11070 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:11217 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:13791 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:13907 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26519 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24479 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24475 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24482 vendor-advisoryx_refsource_REDHAT
Impacted products
Vendor Product Version
github.com/jackc/pgx/v5 github.com/jackc/pgx/v5/pgproto3 Affected: 0 , < 5.9.0 (semver)
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Red Hat Cryostat 4 on RHEL 9     cpe:/a:redhat:cryostat:4::el9
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Red Hat RHEM 1.0 for RHEL 9     cpe:/a:redhat:edge_manager:1.0::el9
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Red Hat Red Hat Enterprise Linux AppStream (v. 10)     cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Custom Metric Autoscaler 2.19     cpe:/a:redhat:openshift_custom_metrics_autoscaler:2.19::el9
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Red Hat Multicluster Global Hub 1.3.4     cpe:/a:redhat:multicluster_globalhub:1.3::el9
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Red Hat Multicluster Global Hub 1.7.1     cpe:/a:redhat:multicluster_globalhub:1.7::el9
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Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.15     cpe:/a:redhat:acm:2.15::el9
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Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.16     cpe:/a:redhat:acm:2.16::el9
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Red Hat Red Hat Advanced Cluster Security for Kubernetes 4.10     cpe:/a:redhat:advanced_cluster_security:4.10::el8
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Red Hat Red Hat Advanced Cluster Security for Kubernetes 4.8     cpe:/a:redhat:advanced_cluster_security:4.8::el8
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Red Hat Red Hat Advanced Cluster Security for Kubernetes 4.9     cpe:/a:redhat:advanced_cluster_security:4.9::el8
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Red Hat Red Hat Hardened Images     cpe:/a:redhat:hummingbird:1
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Red Hat Red Hat OpenShift Pipelines 1.21     cpe:/a:redhat:openshift_pipelines:1.21::el9
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Red Hat Red Hat Trusted Artifact Signer 1.3     cpe:/a:redhat:trusted_artifact_signer:1.3::el9
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Red Hat Custom Metric Autoscaler operator for Red Hat Openshift     cpe:/a:redhat:openshift_custom_metrics_autoscaler:2
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Red Hat Multicluster Engine for Kubernetes     cpe:/a:redhat:multicluster_engine
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Red Hat Multicluster Global Hub     cpe:/a:redhat:multicluster_globalhub
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Red Hat Red Hat 3scale API Management Platform 2     cpe:/a:redhat:red_hat_3scale_amp:2
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Red Hat Red Hat Advanced Cluster Security 4     cpe:/a:redhat:advanced_cluster_security:4
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Red Hat Red Hat Edge Manager 1     cpe:/a:redhat:edge_manager:1
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Red Hat Red Hat OpenShift AI (RHOAI)     cpe:/a:redhat:openshift_ai
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Red Hat Red Hat Openshift Data Foundation 4     cpe:/a:redhat:openshift_data_foundation:4
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Red Hat Red Hat Trusted Artifact Signer     cpe:/a:redhat:trusted_artifact_signer:1
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Red Hat Zero Trust Workload Identity Manager - Tech Preview     cpe:/a:redhat:zero_trust_workload_identity_manager:0
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Red Hat Red Hat Quay 3     cpe:/a:redhat:quay:3
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Red Hat Zero Trust Workload Identity Manager     cpe:/a:redhat:zero_trust_workload_identity_manager:1
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Red Hat OpenShift Pipelines     cpe:/a:redhat:openshift_pipelines:1
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deployment, applicability to widespread installation base or stability.\"}], \"x_generator\": {\"engine\": \"sadp-cli 1.0.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A flaw was found in github.com/jackc/pgx, a PostgreSQL driver for Go. This memory-safety vulnerability could allow an attacker to cause various impacts, such as denial of service (DoS) or potentially arbitrary code execution, by exploiting memory corruption issues. The exact method of exploitation and specific consequences would depend on the nature of the memory corruption.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-787\", \"description\": \"Out-of-bounds Write\"}]}], \"providerMetadata\": {\"orgId\": \"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\", \"shortName\": \"redhat-SADP\", \"dateUpdated\": \"2026-07-09T12:10:01.070Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 9.8, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"CRITICAL\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-33816\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-09T14:24:50.570972Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-09T14:26:04.652Z\"}}], \"cna\": {\"title\": \"CVE-2026-33816 in github.com/jackc/pgx\", \"affected\": [{\"vendor\": \"github.com/jackc/pgx/v5\", \"product\": \"github.com/jackc/pgx/v5/pgproto3\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.9.0\", \"versionType\": \"semver\"}], \"packageName\": \"github.com/jackc/pgx/v5/pgproto3\", \"collectionURL\": \"https://pkg.go.dev\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"FunctionCall.Decode\"}, {\"name\": \"Backend.Receive\"}]}], \"references\": [{\"url\": \"https://pkg.go.dev/vuln/GO-2026-4772\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Memory-safety vulnerability in github.com/jackc/pgx/v5.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"description\": \"CWE-697 \\u2014 Incorrect Comparison\"}]}], \"providerMetadata\": {\"orgId\": \"1bb62c36-49e3-4200-9d77-64a1400537cc\", \"shortName\": \"Go\", \"dateUpdated\": \"2026-04-15T15:49:13.116Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-33816\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-09T12:10:01.070Z\", \"dateReserved\": \"2026-03-23T20:35:32.814Z\", \"assignerOrgId\": \"1bb62c36-49e3-4200-9d77-64a1400537cc\", \"datePublished\": \"2026-04-07T15:19:24.529Z\", \"assignerShortName\": \"Go\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.