CVE-2026-26740 (GCVE-0-2026-26740)

Vulnerability from cvelistv5 – Published: 2026-03-18 00:00 – Updated: 2026-07-23 12:08
VLAI
Summary
Buffer Overflow vulnerability in giflib v.5.2.2 allows a remote attacker to cause a denial of service via the EGifGCBToExtension overwriting an existing Graphic Control Extension block without validating its allocated size.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-18 18:43 UTC
CWE
  • n/a
  • CWE-787 - Out-of-bounds Write
Assigner
mitre CNA under the mitre root
CNA scorecard E 28/100 over 2328 records in the last 180 days details
References
URL Tags
https://github.com/zakkanijia/POC/blob/main/gifli…
https://access.redhat.com/security/cve/CVE-2026-26740 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2448747 issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v… x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:33447 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:9689 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:9693 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:33502 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:33503 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:9683 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:9686 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:33450 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:33455 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:33456 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:33509 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:33452 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:33451 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:33501 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36004 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36005 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36006 vendor-advisoryx_refsource_REDHAT
Impacted products
Vendor Product Version CPE status
Red Hat Red Hat Enterprise Linux 10 Unaffected: 1:21.0.11.0.10-2.el10_2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.1
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Red Hat Red Hat Enterprise Linux 10 Unaffected: 1:25.0.3.0.9-1.el10_2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.1
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Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:5.2.1-25.el10_2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support Unaffected: 0:5.2.1-22.el10_0.2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support Unaffected: 1:21.0.11.0.10-1.el10_2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:5.1.4-5.el8_10 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8
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Red Hat Red Hat Enterprise Linux 8 Unaffected: 1:1.8.0.492.b09-1.el8 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8
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Red Hat Red Hat Enterprise Linux 8 Unaffected: 1:17.0.19.0.10-1.el8 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8
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Red Hat Red Hat Enterprise Linux 8 Unaffected: 1:21.0.11.0.10-1.el8 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8
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Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support Unaffected: 1:1.8.0.492.b09-1.el8 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.2
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Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 0:5.1.4-3.el8_4.2 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4
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Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 1:1.8.0.492.b09-1.el8 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4
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Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 1:17.0.19.0.10-1.el8 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4
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Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Unaffected: 0:5.1.4-3.el8_4.2 , < * (rpm)
    cpe:/a:redhat:rhel_eus_long_life:8.4
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Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Unaffected: 1:1.8.0.492.b09-1.el8 , < * (rpm)
    cpe:/a:redhat:rhel_eus_long_life:8.4
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Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Unaffected: 1:17.0.19.0.10-1.el8 , < * (rpm)
    cpe:/a:redhat:rhel_eus_long_life:8.4
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Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 0:5.1.4-3.el8_6.2 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6
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Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 1:1.8.0.492.b09-1.el8 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6
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Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 1:17.0.19.0.10-1.el8 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6
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Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Unaffected: 0:5.1.4-3.el8_6.2 , < * (rpm)
    cpe:/a:redhat:rhel_eus_long_life:8.6
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Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service Unaffected: 1:1.8.0.492.b09-1.el8 , < * (rpm)
    cpe:/a:redhat:rhel_tus:8.6
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Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service Unaffected: 1:17.0.19.0.10-1.el8 , < * (rpm)
    cpe:/a:redhat:rhel_tus:8.6
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Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Unaffected: 1:1.8.0.492.b09-1.el8 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.6
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Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Unaffected: 1:17.0.19.0.10-1.el8 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.6
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Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 0:5.1.4-3.el8_8.2 , < * (rpm)
    cpe:/a:redhat:rhel_tus:8.8
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Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 1:1.8.0.492.b09-1.el8 , < * (rpm)
    cpe:/a:redhat:rhel_tus:8.8
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Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 1:17.0.19.0.10-1.el8 , < * (rpm)
    cpe:/a:redhat:rhel_tus:8.8
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Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 0:5.1.4-3.el8_8.2 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8
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Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 1:1.8.0.492.b09-1.el8 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8
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Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 1:17.0.19.0.10-1.el8 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8
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Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:5.2.1-10.el9_8.2 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9
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Red Hat Red Hat Enterprise Linux 9 Unaffected: 1:1.8.0.492.b09-2.el9 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9
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Red Hat Red Hat Enterprise Linux 9 Unaffected: 1:17.0.19.0.10-2.el9 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9
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Red Hat Red Hat Enterprise Linux 9 Unaffected: 1:21.0.11.0.10-2.el9 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9
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Red Hat Red Hat Enterprise Linux 9 Unaffected: 1:25.0.3.0.9-1.el9 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9
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Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Unaffected: 1:1.8.0.492.b09-1.el9 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.0
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Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Unaffected: 1:17.0.19.0.10-1.el9 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.0
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Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 0:5.2.1-9.el9_2.2 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2
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Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 1:1.8.0.492.b09-1.el9 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2
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Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 1:17.0.19.0.10-1.el9 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2
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Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support Unaffected: 1:1.8.0.492.b09-1.el9 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.4
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Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support Unaffected: 1:17.0.19.0.10-1.el9 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.4
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Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support Unaffected: 1:21.0.11.0.10-1.el9 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.4
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Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Unaffected: 0:5.2.1-9.el9_4.2 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.4
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Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 0:5.2.1-9.el9_6.2 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6
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Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 1:1.8.0.492.b09-1.el9 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6
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Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 1:17.0.19.0.10-1.el9 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6
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Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 1:21.0.11.0.10-1.el9 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6
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Red Hat Red Hat AI Inference Server 3.2 Unaffected: 1782951051 , < * (rpm)
    cpe:/a:redhat:ai_inference_server:3.2::el9
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Red Hat Red Hat AI Inference Server 3.2 Unaffected: 1782951012 , < * (rpm)
    cpe:/a:redhat:ai_inference_server:3.2::el9
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Red Hat Red Hat AI Inference Server 3.2 Unaffected: 1782951244 , < * (rpm)
    cpe:/a:redhat:ai_inference_server:3.2::el9
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Red Hat Red Hat build of OpenJDK 11 ELS     cpe:/a:redhat:openjdk_els:11
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Red Hat Red Hat build of OpenJDK 17     cpe:/a:redhat:openjdk:17
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Red Hat Red Hat build of OpenJDK 1.8     cpe:/a:redhat:openjdk:1.8
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Red Hat Red Hat build of OpenJDK 21     cpe:/a:redhat:openjdk:21
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Red Hat Red Hat build of OpenJDK 25     cpe:/a:redhat:openjdk:25
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Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
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Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
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Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 8.2,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-26740",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-18T18:43:32.619695Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-787",
                "description": "CWE-787 Out-of-bounds Write",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-18T18:44:14.358Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "affected": [
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10.1"
            ],
            "defaultStatus": "affected",
            "packageName": "java-21-openjdk",
            "product": "Red Hat Enterprise Linux 10",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "1:21.0.11.0.10-2.el10_2",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10.1"
            ],
            "defaultStatus": "affected",
            "packageName": "java-25-openjdk",
            "product": "Red Hat Enterprise Linux 10",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "1:25.0.3.0.9-1.el10_2",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10.2"
            ],
            "defaultStatus": "affected",
            "packageName": "giflib",
            "product": "Red Hat Enterprise Linux 10",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "0:5.2.1-25.el10_2",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/o:redhat:enterprise_linux_eus:10.0"
            ],
            "defaultStatus": "affected",
            "packageName": "giflib",
            "product": "Red Hat Enterprise Linux 10.0 Extended Update Support",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "0:5.2.1-22.el10_0.2",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/o:redhat:enterprise_linux_eus:10.0"
            ],
            "defaultStatus": "affected",
            "packageName": "java-21-openjdk",
            "product": "Red Hat Enterprise Linux 10.0 Extended Update Support",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "1:21.0.11.0.10-1.el10_2",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:8"
            ],
            "defaultStatus": "affected",
            "packageName": "giflib",
            "product": "Red Hat Enterprise Linux 8",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "0:5.1.4-5.el8_10",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:8"
            ],
            "defaultStatus": "affected",
            "packageName": "java-1.8.0-openjdk",
            "product": "Red Hat Enterprise Linux 8",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "1:1.8.0.492.b09-1.el8",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:8"
            ],
            "defaultStatus": "affected",
            "packageName": "java-17-openjdk",
            "product": "Red Hat Enterprise Linux 8",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "1:17.0.19.0.10-1.el8",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:8"
            ],
            "defaultStatus": "affected",
            "packageName": "java-21-openjdk",
            "product": "Red Hat Enterprise Linux 8",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "1:21.0.11.0.10-1.el8",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:rhel_aus:8.2"
            ],
            "defaultStatus": "affected",
            "packageName": "java-1.8.0-openjdk",
            "product": "Red Hat Enterprise Linux 8.2 Advanced Update Support",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "1:1.8.0.492.b09-1.el8",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:rhel_aus:8.4"
            ],
            "defaultStatus": "affected",
            "packageName": "giflib",
            "product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "0:5.1.4-3.el8_4.2",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:rhel_aus:8.4"
            ],
            "defaultStatus": "affected",
            "packageName": "java-1.8.0-openjdk",
            "product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "1:1.8.0.492.b09-1.el8",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:rhel_aus:8.4"
            ],
            "defaultStatus": "affected",
            "packageName": "java-17-openjdk",
            "product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "1:17.0.19.0.10-1.el8",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:rhel_eus_long_life:8.4"
            ],
            "defaultStatus": "affected",
            "packageName": "giflib",
            "product": "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "0:5.1.4-3.el8_4.2",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:rhel_eus_long_life:8.4"
            ],
            "defaultStatus": "affected",
            "packageName": "java-1.8.0-openjdk",
            "product": "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On",
            "vendor": "Red Hat",
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                "value": "RHSA-2026:9693: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"
              },
              {
                "lang": "en",
                "value": "RHSA-2026:33502: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)"
              },
              {
                "lang": "en",
                "value": "RHSA-2026:33503: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8)"
              },
              {
                "lang": "en",
                "value": "RHSA-2026:9683: Red Hat CodeReady Linux Builder EUS (v.9.4), Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux AppStream AUS (v. 8.2), Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream E4S (v.9.0), Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux AppStream EUS (v.9.4), Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4), Red Hat Enterprise Linux AppStream TUS (v.8.6), Red Hat Enterprise Linux AppStream TUS (v.8.8), Red Hat Enterprise Linux CRB (v. 8), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"
              },
              {
                "lang": "en",
                "value": "RHSA-2026:9686: Red Hat CodeReady Linux Builder EUS (v.9.4), Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream E4S (v.9.0), Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux AppStream EUS (v.9.4), Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4), Red Hat Enterprise Linux AppStream TUS (v.8.6), Red Hat Enterprise Linux AppStream TUS (v.8.8), Red Hat Enterprise Linux CRB (v. 8), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"
              },
              {
                "lang": "en",
                "value": "RHSA-2026:33450: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)"
              },
              {
                "lang": "en",
                "value": "RHSA-2026:33455: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)"
              },
              {
                "lang": "en",
                "value": "RHSA-2026:33456: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)"
              },
              {
                "lang": "en",
                "value": "RHSA-2026:33509: Red Hat Enterprise Linux AppStream E4S (v.9.2)"
              },
              {
                "lang": "en",
                "value": "RHSA-2026:33452: Red Hat Enterprise Linux AppStream E4S (v.9.4)"
              },
              {
                "lang": "en",
                "value": "RHSA-2026:33451: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6)"
              },
              {
                "lang": "en",
                "value": "RHSA-2026:33501: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"
              },
              {
                "lang": "en",
                "value": "RHSA-2026:36004: Red Hat AI Inference Server 3.2"
              },
              {
                "lang": "en",
                "value": "RHSA-2026:36005: Red Hat AI Inference Server 3.2"
              },
              {
                "lang": "en",
                "value": "RHSA-2026:36006: Red Hat AI Inference Server 3.2"
              }
            ],
            "timeline": [
              {
                "lang": "en",
                "time": "2026-03-18T19:01:41.415Z",
                "value": "Reported to Red Hat."
              },
              {
                "lang": "en",
                "time": "2026-03-18T00:00:00.000Z",
                "value": "Made public."
              }
            ],
            "title": "giflib: giflib: Denial of Service via buffer overflow in EGifGCBToExtension",
            "workarounds": [
              {
                "lang": "en",
                "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."
              }
            ],
            "x_adpType": "supplier",
            "x_generator": {
              "engine": "sadp-cli 1.0.0"
            }
          },
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "attackComplexity": "LOW",
                  "attackVector": "NETWORK",
                  "availabilityImpact": "HIGH",
                  "baseScore": 8.2,
                  "baseSeverity": "HIGH",
                  "confidentialityImpact": "NONE",
                  "integrityImpact": "LOW",
                  "privilegesRequired": "NONE",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-26740",
                    "options": [
                      {
                        "Exploitation": "poc"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-03-18T18:43:32.619695Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-787",
                    "description": "CWE-787 Out-of-bounds Write",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-03-18T18:42:29.023Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "n/a",
              "vendor": "n/a",
              "versions": [
                {
                  "status": "affected",
                  "version": "n/a"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "Buffer Overflow vulnerability in giflib v.5.2.2 allows a remote attacker to cause a denial of service via the EGifGCBToExtension overwriting an existing Graphic Control Extension block without validating its allocated size."
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "description": "n/a",
                  "lang": "en",
                  "type": "text"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-03-18T17:53:19.684Z",
            "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
            "shortName": "mitre"
          },
          "references": [
            {
              "url": "https://github.com/zakkanijia/POC/blob/main/giflib/giftool/giflib_giftool_gce_len_heap_oobwrite_disclosure.md"
            }
          ]
        }
      },
      "cveMetadata": {
        "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "assignerShortName": "mitre",
        "cveId": "CVE-2026-26740",
        "datePublished": "2026-03-18T00:00:00.000Z",
        "dateReserved": "2026-02-16T00:00:00.000Z",
        "dateUpdated": "2026-07-23T12:08:00.184Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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.

Events included in the timeline

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    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.