CVE-2026-32288

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{"bugzilla": {"description": "archive/tar: golang: Go's archive/tar package: Denial of Service via maliciously-crafted archive", "id": "2456332", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2456332"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-770", "details": ["A flaw was found in Go's `archive/tar` package. A remote attacker could exploit this vulnerability by providing a maliciously-crafted archive file. When the `tar.Reader` processes an archive containing a large number of sparse regions in the \"old GNU sparse map\" format, it can lead to unbounded memory allocation. This can result in a Denial of Service (DoS) condition, making the affected application unresponsive."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-32288", "package_state": [{"cpe": "cpe:/a:redhat:assisted_installer:2", "fix_state": "Fix deferred", "package_name": "redhat-user-workloads/assisted-installer-ds-main", "product_name": "Assisted Installer for Red Hat OpenShift Container Platform 2"}, {"cpe": "cpe:/a:redhat:openshift_builds:1", "fix_state": "Fix deferred", "package_name": "redhat-user-workloads/openshift-builds-waiter-1-6", "product_name": "Builds for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:openshift_builds:1", "fix_state": "Fix deferred", "package_name": "redhat-user-workloads/openshift-builds-waiter-1-7", 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"product_name": "Red Hat Trusted Artifact Signer"}, {"cpe": "cpe:/a:redhat:openshift_security_profiles_operator:1", "fix_state": "Fix deferred", "package_name": "redhat-user-workloads/security-profiles-operator-release", "product_name": "Security Profiles Operator"}, {"cpe": "cpe:/a:redhat:zero_trust_workload_identity_manager:1", "fix_state": "Fix deferred", "package_name": "redhat-user-workloads/spiffe-spire-agent-1-13-3", "product_name": "Zero Trust Workload Identity Manager"}, {"cpe": "cpe:/a:redhat:zero_trust_workload_identity_manager:0", "fix_state": "Fix deferred", "package_name": "redhat-user-workloads/spiffe-spire-agent-1-12-4", "product_name": "Zero Trust Workload Identity Manager - Tech Preview"}], "public_date": "2026-04-08T01:06:57Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-32288\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-32288\nhttps://go.dev/cl/763766\nhttps://go.dev/issue/78301\nhttps://groups.google.com/g/golang-announce/c/0uYbvbPZRWU\nhttps://pkg.go.dev/vuln/GO-2026-4869"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.25.9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.26.0-0,1.26.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "archive/tar", "vendor": "go_standard_library"}], "analysis": {"en": {"generated_at": "2026-04-13T21:04:38.519798+00:00", "value": {"mitigation_remediation": ["Update the Go runtime to a version that includes the latest fix for the unbounded allocation issue in archive/tar."], "summary": {"action": "Update", "impact": "Unbounded memory allocation when parsing tar archives using the old GNU sparse map format."}, "threat_synthesis": {"affected_systems": "The vulnerability affects the Go standard library package archive/tar. No specific version ranges are provided in the source data, so any application that imports archive/tar and processes user supplied tar files is potentially exposed. If a system relies on an older Go release that has not yet been patched, it remains vulnerable.", "description_and_impact": "A tar.Reader in the Go standard library can allocate an unlimited amount of memory when parsing a malicious archive that contains a large number of sparse regions encoded in the old GNU sparse map format. The resulting out\u2011of\u2011memory condition can cause the process to crash or be terminated, leading to a denial\u2011of\u2011service impact. The weakness corresponds to CWE-770, indicating an unbounded allocation of resources.", "risk_and_exploitability": "The CVSS score of 5.5 indicates a moderate severity. The EPSS score of less than 1% suggests that the probability of exploitation in the wild is low, and the vulnerability is not listed in the CISA KEV catalog. The likely attack vector involves an adversary supplying a specially crafted tar archive to an application that uses the affected tar.Reader implementation. Exploitation requires the target to accept and process the archive; if the archive is refused or the application terminates before allocation, the impact is mitigated. In environments where arbitrary tar inputs are processed, the risk is higher because the resource exhaustion can disrupt service availability."}}}}, "created": "2026-04-08T19:44:20.014758+00:00", "updated": "2026-04-14T16:40:16.577127+00:00", "vendors": ["go_standard_library", "go_standard_library$PRODUCT$archive/tar"]}