Vulnerability-Lookup

RHSA-2026:74948

Vulnerability from csaf_redhat - Published: 2026-10-02 12:11 - Updated: 2026-11-07 05:52

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Severity

Important

Notes

Topic: An update for Red Hat Hardened Images RPMs is now available.

Details: This update includes the following RPMs: opentofu1.12: * opentofu1.12-1.12.7-0.1.hum1 (aarch64, x86_64) * opentofu1.12-1.12.7-0.1.hum1.src (src) Security Fix(es): opentofu1.12: * CVE-2026-81871

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-56851

A flaw was found in golang.org/x/text. An attacker can cause a Denial of Service (DoS) by submitting specially crafted input to an application utilizing the Nickname profile. When transforming this input into an undersized destination buffer, an out-of-bounds slice indexing error occurs, causing the application to panic and crash.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-787 - Out-of-bounds Write

Affected products

Fixed 3 products

Product	Version	Remediation
Unresolved product id: Red Hat Hardened Images:opentofu1.12-0:1.12.7-0.1.hum1@aarch64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:opentofu1.12-0:1.12.7-0.1.hum1@src	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:opentofu1.12-0:1.12.7-0.1.hum1@x86_64	—	Vendor Fix fix

Threats

Impact Important

CVE-2026-81871

A flaw was found in OpenTelemetry-Go, specifically within its gRPC log exporter. This vulnerability allows a network attacker to bypass the intended private Certificate Authority (CA) pinning and mutual Transport Layer Security (TLS) configurations. The issue arises because the environment-only TLS path incorrectly uses system-trusted certificates instead of the application's configured client certificates. This bypass enables an attacker to intercept and spoof the collector connection, potentially leading to the unauthorized reading or alteration of sensitive log telemetry.

6.5 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CWE-295 - Improper Certificate Validation

Affected products

Fixed 3 products, the same list as for CVE-2026-56851

Threats

Impact Moderate

References

20 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:74948	self
https://access.redhat.com/security/cve/CVE-2026-81871	external
https://access.redhat.com/security/updates/classi…	external
https://images.redhat.com/	external
https://access.redhat.com/security/cve/CVE-2026-56851	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-56851	self
https://bugzilla.redhat.com/show_bug.cgi?id=2547607	external
https://www.cve.org/CVERecord?id=CVE-2026-56851	external
https://nvd.nist.gov/vuln/detail/CVE-2026-56851	external
https://go.dev/cl/793360	external
https://go.dev/issue/80112	external
https://pkg.go.dev/vuln/GO-2026-6629	external
https://access.redhat.com/security/cve/CVE-2026-81871	self
https://bugzilla.redhat.com/show_bug.cgi?id=2535725	external
https://www.cve.org/CVERecord?id=CVE-2026-81871	external
https://nvd.nist.gov/vuln/detail/CVE-2026-81871	external
https://github.com/open-telemetry/opentelemetry-g…	external
https://github.com/open-telemetry/opentelemetry-g…	external
https://github.com/open-telemetry/opentelemetry-g…	external

JSON

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      "discovery_date": "2026-10-07T18:01:23.622132+00:00",
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          "text": "A flaw was found in golang.org/x/text. An attacker can cause a Denial of Service (DoS) by submitting specially crafted input to an application utilizing the Nickname profile. When transforming this input into an undersized destination buffer, an out-of-bounds slice indexing error occurs, causing the application to panic and crash.",
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    {
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      "cwe": {
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      "discovery_date": "2026-09-16T21:01:17.270123+00:00",
      "ids": [
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          "text": "2535725"
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          "text": "A flaw was found in OpenTelemetry-Go, specifically within its gRPC log exporter. This vulnerability allows a network attacker to bypass the intended private Certificate Authority (CA) pinning and mutual Transport Layer Security (TLS) configurations. The issue arises because the environment-only TLS path incorrectly uses system-trusted certificates instead of the application\u0027s configured client certificates. This bypass enables an attacker to intercept and spoof the collector connection, potentially leading to the unauthorized reading or alteration of sensitive log telemetry.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc: OpenTelemetry-Go: TLS certificate bypass allows log telemetry interception and alteration",
          "title": "Vulnerability summary"
        },
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          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
            "Red Hat Hardened Images:opentofu1.12-0:1.12.7-0.1.hum1@aarch64",
            "Red Hat Hardened Images:opentofu1.12-0:1.12.7-0.1.hum1@src",
            "Red Hat Hardened Images:opentofu1.12-0:1.12.7-0.1.hum1@x86_64"
          ],
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        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:opentofu1.12-0:1.12.7-0.1.hum1@aarch64",
            "Red Hat Hardened Images:opentofu1.12-0:1.12.7-0.1.hum1@src",
            "Red Hat Hardened Images:opentofu1.12-0:1.12.7-0.1.hum1@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc: OpenTelemetry-Go: TLS certificate bypass allows log telemetry interception and alteration"
    }
  ]
}

CVE-2026-56851 (GCVE-0-2026-56851)

Vulnerability from cvelistv5 – Published: 2026-10-07 17:46 – Updated: 2026-10-08 13:49

Title

Panic parsing crafted input in x/text/secure/precis in golang.org/x/text

Summary

The Nickname profile can panic with an out-of-bounds slice error when transforming crafted input into a short destination buffer.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-08 13:48 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

Go CNA under the Google root

CNA scorecard E 42/100 over 76 records in the last 180 days details

References

3 references

URL	Tags
https://go.dev/cl/793360
https://go.dev/issue/80112
https://pkg.go.dev/vuln/GO-2026-6629

Impacted products

1 product

Vendor	Product	Version
golang.org/x/text	golang.org/x/text/secure/precis	Affected: 0 , < 0.41.0 (semver)

Credits

Omkhar Arasaratnam (GitHub: omkhar)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-56851",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-08T13:48:57.351617Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-787",
                "description": "CWE-787 Out-of-bounds Write",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-08T13:49:06.348Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/text/secure/precis",
          "product": "golang.org/x/text/secure/precis",
          "programRoutines": [
            {
              "name": "nickAdditionalMapping.Transform"
            },
            {
              "name": "Profile.Append"
            },
            {
              "name": "Profile.AppendCompareKey"
            },
            {
              "name": "Profile.Bytes"
            },
            {
              "name": "Profile.Compare"
            },
            {
              "name": "Profile.CompareKey"
            },
            {
              "name": "Profile.NewTransformer"
            },
            {
              "name": "Profile.String"
            },
            {
              "name": "Transformer.Bytes"
            },
            {
              "name": "Transformer.String"
            },
            {
              "name": "Transformer.Transform"
            }
          ],
          "vendor": "golang.org/x/text",
          "versions": [
            {
              "lessThan": "0.41.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Omkhar Arasaratnam (GitHub: omkhar)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Nickname profile can panic with an out-of-bounds slice error when transforming crafted input into a short destination buffer."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-787: Out-of-bounds Write",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-07T17:46:35.620Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/cl/793360"
        },
        {
          "url": "https://go.dev/issue/80112"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6629"
        }
      ],
      "title": "Panic parsing crafted input in x/text/secure/precis in golang.org/x/text"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-56851",
    "datePublished": "2026-10-07T17:46:35.620Z",
    "dateReserved": "2026-06-23T15:10:49.352Z",
    "dateUpdated": "2026-10-08T13:49:06.348Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-81871 (GCVE-0-2026-81871)

Vulnerability from cvelistv5 – Published: 2026-09-16 20:43 – Updated: 2026-09-17 19:24

Title

OpenTelemetry-Go: Log gRPC exporter ignores env TLS certs, bypassing mTLS/pinning

Summary

OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to version 0.21.0, the exporters/otlp/otlplog/otlploggrpc package loads OTEL_EXPORTER_OTLP_LOGS_CERTIFICATE, OTEL_EXPORTER_OTLP_CERTIFICATE, and related client certificate environment variables through loadEnvTLS into cfg.tlsCfg, but newGRPCDialOptions does not apply cfg.tlsCfg when creating gRPC transport credentials. The environment-only TLS path instead uses credentials.NewTLS with system roots and no configured client certificate, bypassing intended private CA pinning and mutual TLS unless the application also supplies WithTLSCredentials. A network attacker able to intercept or spoof the collector connection with a system-trusted certificate can read or alter log telemetry. This issue is fixed in version 0.21.0.

Severity

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-17 17:10 UTC

CWE

CWE-295 - Improper Certificate Validation
CWE-923 - Improper Restriction of Communication Channel to Intended Endpoints

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7886 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/open-telemetry/opentelemetry-g…	x_refsource_CONFIRM
https://github.com/open-telemetry/opentelemetry-g…	x_refsource_MISC
https://github.com/open-telemetry/opentelemetry-g…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
open-telemetry	opentelemetry-go	Affected: < 0.21.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-81871",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-17T17:10:34.419383Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-17T19:24:00.081Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "opentelemetry-go",
          "vendor": "open-telemetry",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.21.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to version 0.21.0, the exporters/otlp/otlplog/otlploggrpc package loads OTEL_EXPORTER_OTLP_LOGS_CERTIFICATE, OTEL_EXPORTER_OTLP_CERTIFICATE, and related client certificate environment variables through loadEnvTLS into cfg.tlsCfg, but newGRPCDialOptions does not apply cfg.tlsCfg when creating gRPC transport credentials. The environment-only TLS path instead uses credentials.NewTLS with system roots and no configured client certificate, bypassing intended private CA pinning and mutual TLS unless the application also supplies WithTLSCredentials. A network attacker able to intercept or spoof the collector connection with a system-trusted certificate can read or alter log telemetry. This issue is fixed in version 0.21.0."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-295",
              "description": "CWE-295: Improper Certificate Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-923",
              "description": "CWE-923: Improper Restriction of Communication Channel to Intended Endpoints",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T20:43:40.119Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w34q-cm8f-9c5x",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w34q-cm8f-9c5x"
        },
        {
          "name": "https://github.com/open-telemetry/opentelemetry-go/commit/c65d435b43e5e6b82310e6b18dd4cdcb8ac63a0c",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-telemetry/opentelemetry-go/commit/c65d435b43e5e6b82310e6b18dd4cdcb8ac63a0c"
        },
        {
          "name": "https://github.com/open-telemetry/opentelemetry-go/releases/tag/exporters/otlp/otlplog/otlploggrpc/v0.21.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-telemetry/opentelemetry-go/releases/tag/exporters/otlp/otlplog/otlploggrpc/v0.21.0"
        }
      ],
      "source": {
        "advisory": "GHSA-w34q-cm8f-9c5x",
        "discovery": "UNKNOWN"
      },
      "title": "OpenTelemetry-Go: Log gRPC exporter ignores env TLS certs, bypassing mTLS/pinning"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-81871",
    "datePublished": "2026-09-16T20:43:40.119Z",
    "dateReserved": "2026-08-27T17:48:42.120Z",
    "dateUpdated": "2026-09-17T19:24:00.081Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

RHSA-2026:74948

CVE-2026-56851 (GCVE-0-2026-56851)

CVE-2026-81871 (GCVE-0-2026-81871)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour