RHSA-2026:5948
Vulnerability from csaf_redhat - Published: 2026-03-26 14:31 - Updated: 2026-03-31 19:56A flaw was found in the net/url package in the Go standard library. The package does not enforce a limit on the number of unique query parameters it parses. A Go application using the net/http.Request.ParseForm method will try to process all parameters provided in the request. A specially crafted HTTP request containing a massive number of query parameters will cause the application to consume an excessive amount of memory, eventually causing the application to crash or become unresponsive, resulting in a denial of service.
A flaw was found in the archive/zip package in the Go standard library. A super-linear file name indexing algorithm is used in the first time a file in an archive is opened. A crafted zip archive containing a specific arrangement of file names can cause an excessive CPU and memory consumption. A Go application processing a malicious archive can become unresponsive or crash, resulting in a denial of service.
A flaw was found in cmd/go. An attacker can exploit this by building a malicious Go source file that uses the '#cgo pkg-config:' directive. This allows the attacker to write to an arbitrary file with partial control over its content, by providing a '--log-file' argument to the pkg-config command. This vulnerability can lead to arbitrary file write.
A flaw was found in Go's 'cgo tool'. This vulnerability arises from a discrepancy in how Go and C/C++ comments are parsed, which allows for malicious code to be hidden within comments and then "smuggled" into the compiled `cgo` binary. An attacker could exploit this to embed and execute arbitrary code, potentially leading to significant system compromise.
During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the resumed handshake, the resumed handshake may succeed when it should have failed. This may happen when a user calls Config.Clone and mutates the returned Config, or uses Config.GetConfigForClient. This can cause a client to resume a session with a server that it would not have resumed with during the initial handshake, or cause a server to resume a session with a client that it would not have resumed with during the initial handshake.
A flaw was found in Istio. A user of Istio could be impacted if the JSON Web Key Set (JWKS) resolver becomes unavailable or fails to fetch keys. This vulnerability can lead to the exposure of hardcoded default settings, potentially bypassing authentication mechanisms and allowing unauthorized access.
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"text": "Red Hat OpenShift Service Mesh 3.0.9\n\nThis update has a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
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"text": "Red Hat OpenShift Service Mesh 3.0.9, which is based on the open source Istio project, addresses a variety of problems in a microservice architecture by creating a centralized point of control in an application.\n\nFixes/Improvements:\n\nSecurity Fix(es):\n\n* istio-rhel9-operator: Unexpected session resumption in crypto/tls (CVE-2025-68121)\n\n* istio-cni-rhel9: Unexpected session resumption in crypto/tls (CVE-2025-68121)\n\n* istio-pilot-rhel9: Unexpected session resumption in crypto/tls (CVE-2025-68121)\n\n* istio-proxyv2-rhel9: Unexpected session resumption in crypto/tls (CVE-2025-68121)\n\n* istio-rhel9-operator: Potential code smuggling via doc comments in cmd/cgo (CVE-2025-61732)\n\n* istio-cni-rhel9: Potential code smuggling via doc comments in cmd/cgo (CVE-2025-61732)\n\n* istio-pilot-rhel9: Potential code smuggling via doc comments in cmd/cgo (CVE-2025-61732)\n\n* istio-proxyv2-rhel9: Potential code smuggling via doc comments in cmd/cgo (CVE-2025-61732)\n\n* istio-rhel9-operator: cmd/go: Arbitrary file write via malicious pkg-config directive (CVE-2025-61731)\n\n* istio-cni-rhel9: cmd/go: Arbitrary file write via malicious pkg-config directive (CVE-2025-61731)\n\n* istio-pilot-rhel9: cmd/go: Arbitrary file write via malicious pkg-config directive (CVE-2025-61731)\n\n* istio-proxyv2-rhel9: cmd/go: Arbitrary file write via malicious pkg-config directive (CVE-2025-61731)\n\n* istio-rhel9-operator: Excessive CPU consumption when building archive index in archive/zip (CVE-2025-61728)\n\n* istio-cni-rhel9: Excessive CPU consumption when building archive index in archive/zip (CVE-2025-61728)\n\n* istio-pilot-rhel9: Excessive CPU consumption when building archive index in archive/zip (CVE-2025-61728)\n\n* istio-proxyv2-rhel9: Excessive CPU consumption when building archive index in archive/zip (CVE-2025-61728)\n\n* istio-rhel9-operator: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726)\n\n* istio-cni-rhel9: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726)\n\n* istio-pilot-rhel9: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726)\n\n* istio-proxyv2-rhel9: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726)\n\n* istio-pilot-rhel9: JWKS Resolver Failure May Expose Hardcoded Default Keys (CVE-2026-31837)\n\n* istio-proxyv2-rhel9: JWKS Resolver Failure May Expose Hardcoded Default Keys (CVE-2026-31837)",
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"text": "A flaw was found in the net/url package in the Go standard library. The package does not enforce a limit on the number of unique query parameters it parses. A Go application using the net/http.Request.ParseForm method will try to process all parameters provided in the request. A specially crafted HTTP request containing a massive number of query parameters will cause the application to consume an excessive amount of memory, eventually causing the application to crash or become unresponsive, resulting in a denial of service.",
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"text": "golang: net/url: Memory exhaustion in query parameter parsing in net/url",
"title": "Vulnerability summary"
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"text": "To exploit this flaw, an attacker must be able to send a specially crafted HTTP request to an application parsing URL-encoded forms with net/url, specifically a request containing a large number of unique query parameters. The request will cause the application to consume an excessive amount of memory and eventually result in a denial of service, with no impact to confidentiality or integrity. Due to this reason, this vulnerability has been rated with an important severity.",
"title": "Statement"
},
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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"url": "https://www.cve.org/CVERecord?id=CVE-2025-61726"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-61726",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61726"
},
{
"category": "external",
"summary": "https://go.dev/cl/736712",
"url": "https://go.dev/cl/736712"
},
{
"category": "external",
"summary": "https://go.dev/issue/77101",
"url": "https://go.dev/issue/77101"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc",
"url": "https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-4341",
"url": "https://pkg.go.dev/vuln/GO-2026-4341"
}
],
"release_date": "2026-01-28T19:30:31.215000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-03-26T14:31:40+00:00",
"details": "See Red Hat OpenShift Service Mesh 3.0.9 documentation at https://docs.redhat.com/en/documentation/red_hat_openshift_service_mesh/3.0",
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:5948"
},
{
"category": "workaround",
"details": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.",
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}
],
"scores": [
{
"cvss_v3": {
"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"
},
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]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "golang: net/url: Memory exhaustion in query parameter parsing in net/url"
},
{
"cve": "CVE-2025-61728",
"cwe": {
"id": "CWE-770",
"name": "Allocation of Resources Without Limits or Throttling"
},
"discovery_date": "2026-01-28T20:01:39.965024+00:00",
"flags": [
{
"label": "vulnerable_code_not_present",
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]
}
],
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2434431"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the archive/zip package in the Go standard library. A super-linear file name indexing algorithm is used in the first time a file in an archive is opened. A crafted zip archive containing a specific arrangement of file names can cause an excessive CPU and memory consumption. A Go application processing a malicious archive can become unresponsive or crash, resulting in a denial of service.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "golang: archive/zip: Excessive CPU consumption when building archive index in archive/zip",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "To exploit this flaw, an attacker needs to be able to process a malicious zip archive with an application using the archive/zip package. Additionally, this vulnerability can cause a Go application to consume an excessive amount of CPU and memory, eventually resulting in a denial of service with no other security impact. Due to these reasons, this flaw has been rated with a moderate severity.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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],
"known_not_affected": [
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"Red Hat OpenShift Service Mesh 3:registry.redhat.io/openshift-service-mesh/istio-must-gather-rhel9@sha256:041058c4ed2cc602c6a0fc41205de07791679bdf0511650fabb1a6251d5aff13_amd64",
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]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-61728"
},
{
"category": "external",
"summary": "RHBZ#2434431",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2434431"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-61728",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-61728"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-61728",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61728"
},
{
"category": "external",
"summary": "https://go.dev/cl/736713",
"url": "https://go.dev/cl/736713"
},
{
"category": "external",
"summary": "https://go.dev/issue/77102",
"url": "https://go.dev/issue/77102"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc",
"url": "https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-4342",
"url": "https://pkg.go.dev/vuln/GO-2026-4342"
}
],
"release_date": "2026-01-28T19:30:31.354000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-03-26T14:31:40+00:00",
"details": "See Red Hat OpenShift Service Mesh 3.0.9 documentation at https://docs.redhat.com/en/documentation/red_hat_openshift_service_mesh/3.0",
"product_ids": [
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],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:5948"
},
{
"category": "workaround",
"details": "To mitigate this vulnerability, implement a timeout in your archive/zip processing logic to abort the operation if it exceeds a few seconds, preventing the application from consuming an excessive amount of resources.",
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]
}
],
"scores": [
{
"cvss_v3": {
"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"
},
"products": [
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]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "golang: archive/zip: Excessive CPU consumption when building archive index in archive/zip"
},
{
"cve": "CVE-2025-61731",
"cwe": {
"id": "CWE-88",
"name": "Improper Neutralization of Argument Delimiters in a Command (\u0027Argument Injection\u0027)"
},
"discovery_date": "2026-01-28T20:01:45.587773+00:00",
"flags": [
{
"label": "vulnerable_code_not_present",
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]
}
],
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2434433"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in cmd/go. An attacker can exploit this by building a malicious Go source file that uses the \u0027#cgo pkg-config:\u0027 directive. This allows the attacker to write to an arbitrary file with partial control over its content, by providing a \u0027--log-file\u0027 argument to the pkg-config command. This vulnerability can lead to arbitrary file write.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "cmd/go: cmd/go: Arbitrary file write via malicious pkg-config directive",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability is Important rather than Moderate because compiling a malicious Go source file can cause `pkg-config` to create or append data to files at attacker-chosen locations, subject to the permissions of the build user. This can enable unintended filesystem modifications during the build process, which can lead to broken builds, alter tool behavior, and poison caches or artifacts, even without direct code execution.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-61731"
},
{
"category": "external",
"summary": "RHBZ#2434433",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2434433"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-61731",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-61731"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-61731",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61731"
},
{
"category": "external",
"summary": "https://go.dev/cl/736711",
"url": "https://go.dev/cl/736711"
},
{
"category": "external",
"summary": "https://go.dev/issue/77100",
"url": "https://go.dev/issue/77100"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc",
"url": "https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-4339",
"url": "https://pkg.go.dev/vuln/GO-2026-4339"
}
],
"release_date": "2026-01-28T19:30:30.844000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-03-26T14:31:40+00:00",
"details": "See Red Hat OpenShift Service Mesh 3.0.9 documentation at https://docs.redhat.com/en/documentation/red_hat_openshift_service_mesh/3.0",
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:5948"
},
{
"category": "workaround",
"details": "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.",
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]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 8.6,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
"version": "3.1"
},
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}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "cmd/go: cmd/go: Arbitrary file write via malicious pkg-config directive"
},
{
"cve": "CVE-2025-61732",
"discovery_date": "2026-02-05T05:00:47.678207+00:00",
"flags": [
{
"label": "vulnerable_code_not_present",
"product_ids": [
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]
}
],
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2437016"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Go\u0027s \u0027cgo tool\u0027. This vulnerability arises from a discrepancy in how Go and C/C++ comments are parsed, which allows for malicious code to be hidden within comments and then \"smuggled\" into the compiled `cgo` binary. An attacker could exploit this to embed and execute arbitrary code, potentially leading to significant system compromise.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "cmd/cgo: Go cgo: Code smuggling due to comment parsing discrepancy",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important vulnerability in the `cmd/cgo` component of the Go toolchain. A parsing discrepancy between Go and C/C++ comments could allow for code smuggling into the resulting `cgo` binary. This primarily affects systems where untrusted Go modules utilizing `cgo` are built, impacting Red Hat Enterprise Linux and OpenShift Container Platform.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-61732"
},
{
"category": "external",
"summary": "RHBZ#2437016",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2437016"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-61732",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-61732"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-61732",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61732"
},
{
"category": "external",
"summary": "https://go.dev/cl/734220",
"url": "https://go.dev/cl/734220"
},
{
"category": "external",
"summary": "https://go.dev/issue/76697",
"url": "https://go.dev/issue/76697"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/K09ubi9FQFk",
"url": "https://groups.google.com/g/golang-announce/c/K09ubi9FQFk"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-4433",
"url": "https://pkg.go.dev/vuln/GO-2026-4433"
}
],
"release_date": "2026-02-05T03:42:26.392000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-03-26T14:31:40+00:00",
"details": "See Red Hat OpenShift Service Mesh 3.0.9 documentation at https://docs.redhat.com/en/documentation/red_hat_openshift_service_mesh/3.0",
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:5948"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
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]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "cmd/cgo: Go cgo: Code smuggling due to comment parsing discrepancy"
},
{
"cve": "CVE-2025-68121",
"discovery_date": "2026-02-05T18:01:30.086058+00:00",
"flags": [
{
"label": "vulnerable_code_not_present",
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]
}
],
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2437111"
}
],
"notes": [
{
"category": "description",
"text": "During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the resumed handshake, the resumed handshake may succeed when it should have failed. This may happen when a user calls Config.Clone and mutates the returned Config, or uses Config.GetConfigForClient. This can cause a client to resume a session with a server that it would not have resumed with during the initial handshake, or cause a server to resume a session with a client that it would not have resumed with during the initial handshake.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "crypto/tls: Unexpected session resumption in crypto/tls",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-68121"
},
{
"category": "external",
"summary": "RHBZ#2437111",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2437111"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-68121",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-68121"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-68121",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68121"
},
{
"category": "external",
"summary": "https://go.dev/cl/737700",
"url": "https://go.dev/cl/737700"
},
{
"category": "external",
"summary": "https://go.dev/issue/77217",
"url": "https://go.dev/issue/77217"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/K09ubi9FQFk",
"url": "https://groups.google.com/g/golang-announce/c/K09ubi9FQFk"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-4337",
"url": "https://pkg.go.dev/vuln/GO-2026-4337"
}
],
"release_date": "2026-02-05T17:48:44.141000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-03-26T14:31:40+00:00",
"details": "See Red Hat OpenShift Service Mesh 3.0.9 documentation at https://docs.redhat.com/en/documentation/red_hat_openshift_service_mesh/3.0",
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"url": "https://access.redhat.com/errata/RHSA-2026:5948"
}
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"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "crypto/tls: Unexpected session resumption in crypto/tls"
},
{
"cve": "CVE-2026-31837",
"cwe": {
"id": "CWE-1392",
"name": "Use of Default Credentials"
},
"discovery_date": "2026-03-10T23:02:58.238399+00:00",
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}
],
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2446344"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Istio. A user of Istio could be impacted if the JSON Web Key Set (JWKS) resolver becomes unavailable or fails to fetch keys. This vulnerability can lead to the exposure of hardcoded default settings, potentially bypassing authentication mechanisms and allowing unauthorized access.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "istio: Istio: Information disclosure and authentication bypass via JWKS resolver unavailability",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-31837"
},
{
"category": "external",
"summary": "RHBZ#2446344",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2446344"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-31837",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-31837"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-31837",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31837"
},
{
"category": "external",
"summary": "https://github.com/istio/istio/security/advisories/GHSA-v75c-crr9-733c",
"url": "https://github.com/istio/istio/security/advisories/GHSA-v75c-crr9-733c"
}
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"release_date": "2026-03-10T21:57:44.387000+00:00",
"remediations": [
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"date": "2026-03-26T14:31:40+00:00",
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},
"url": "https://access.redhat.com/errata/RHSA-2026:5948"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
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"Red Hat OpenShift Service Mesh 3:registry.redhat.io/openshift-service-mesh/istio-proxyv2-rhel9@sha256:473c10e26272fee90233bb95c1c434f45c4fce2170ee99ff674c2d56642c2ef4_ppc64le",
"Red Hat OpenShift Service Mesh 3:registry.redhat.io/openshift-service-mesh/istio-proxyv2-rhel9@sha256:8238270e2aab1a016cd4e66de470f499e9f33e95a2547dd72722814e8b71063e_s390x",
"Red Hat OpenShift Service Mesh 3:registry.redhat.io/openshift-service-mesh/istio-proxyv2-rhel9@sha256:8e17971e0f5d14b920841b11b2d084a1275bb942566edde1ac4789452ee92bd2_amd64",
"Red Hat OpenShift Service Mesh 3:registry.redhat.io/openshift-service-mesh/istio-proxyv2-rhel9@sha256:efc87388d29385d36a26a19da1adb52bd9ef8dea42503b409d1f3d25769c3e76_arm64",
"Red Hat OpenShift Service Mesh 3:registry.redhat.io/openshift-service-mesh/istio-rhel9-operator@sha256:9d1c49aac324418a6c9422990e7e83aaffbd2bdf73cd37ab692ae19a6e675a18_arm64",
"Red Hat OpenShift Service Mesh 3:registry.redhat.io/openshift-service-mesh/istio-rhel9-operator@sha256:e67e1607b7d2a354399aa5c32ad7e776650f95e978591f3e6fd80b335a0dd3e9_s390x",
"Red Hat OpenShift Service Mesh 3:registry.redhat.io/openshift-service-mesh/istio-rhel9-operator@sha256:f9399b41994032dbf514eb7ab8576614e7139a35af239efc1f05de497b9755d1_amd64",
"Red Hat OpenShift Service Mesh 3:registry.redhat.io/openshift-service-mesh/istio-rhel9-operator@sha256:fe35fc6ea8320c1d0e8ee0712788879daee23d4cea6b970237375e264344ddd0_ppc64le",
"Red Hat OpenShift Service Mesh 3:registry.redhat.io/openshift-service-mesh/istio-sail-operator-bundle@sha256:6067e8bd752fec6a4c9791b5416feebd3755e812677393c1c2ad4746f5aced5e_amd64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "istio: Istio: Information disclosure and authentication bypass via JWKS resolver unavailability"
}
]
}
Sightings
| Author | Source | Type | Date |
|---|
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.