{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-18303", "assignerOrgId": "99f1926a-a320-47d8-bbb5-42feb611262e", "state": "PUBLISHED", "assignerShortName": "zdi", "dateReserved": "2026-07-29T17:12:49.395Z", "datePublished": "2026-08-20T16:23:19.019Z", "dateUpdated": "2026-08-27T16:24:53.446Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "99f1926a-a320-47d8-bbb5-42feb611262e", "shortName": "zdi", "dateUpdated": "2026-08-20T16:23:19.019Z"}, "title": "GIMP TIF File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability", "descriptions": [{"lang": "en", "value": "GIMP TIF File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GIMP. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the parsing of TIF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29399."}], "affected": [{"vendor": "GIMP", "product": "GIMP", "versions": [{"version": "3.2.2", "status": "affected"}], "defaultStatus": "unknown"}], "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-121", "description": "CWE-121: Stack-based Buffer Overflow", "type": "CWE"}]}], "references": [{"url": "https://www.zerodayinitiative.com/advisories/ZDI-26-456/", "name": "ZDI-26-456", "tags": ["x_research-advisory"]}, {"url": "https://gitlab.gnome.org/GNOME/gimp/-/commit/5633b362026c6e5b2beb559a10cd76fa32a47592", "name": "vendor-provided URL", "tags": ["vendor-advisory"]}], "dateAssigned": "2026-07-29T17:12:49.421Z", "datePublic": "2026-07-29T21:28:16.248Z", "source": {"lang": "en", "value": "Anonymous"}, "metrics": [{"format": "CVSS", "cvssV3_0": {"version": "3.0", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-18303", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-08-21T03:57:20.764086Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-27T16:24:53.446Z"}}]}}

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{"affected": [{"affectedData": [{"defaultStatus": "unknown", "product": "GIMP", "vendor": "GIMP", "versions": [{"status": "affected", "version": "3.2.2"}]}], "source": "zdi-disclosures@trendmicro.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "GIMP TIF File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GIMP. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the parsing of TIF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29399."}], "id": "CVE-2026-18303", "lastModified": "2026-08-27T17:17:26.270", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "zdi-disclosures@trendmicro.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-18303", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-21T03:57:20.764086Z", "version": "2.0.3"}}]}, "published": "2026-08-20T17:17:27.277", "references": [{"source": "zdi-disclosures@trendmicro.com", "url": "https://gitlab.gnome.org/GNOME/gimp/-/commit/5633b362026c6e5b2beb559a10cd76fa32a47592"}, {"source": "zdi-disclosures@trendmicro.com", "url": "https://www.zerodayinitiative.com/advisories/ZDI-26-456/"}], "sourceIdentifier": "zdi-disclosures@trendmicro.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-121"}], "source": "zdi-disclosures@trendmicro.com", "type": "Secondary"}]}

{"bugzilla": {"description": "gimp: GIMP: Remote code execution via TIF file parsing vulnerability", "id": "2520583", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520583"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-120", "details": ["GIMP TIF File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GIMP. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\nThe specific flaw exists within the parsing of TIF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29399.", "A flaw was found in GIMP. This vulnerability, a stack-based buffer overflow in the TIF file parsing component, allows a remote attacker to execute arbitrary code. User interaction is required, as the target must open a specially crafted malicious TIF file. The issue stems from insufficient validation of user-supplied data length before copying it to a buffer, leading to potential code execution in the context of the current process."], "mitigation": {"lang": "en:us", "value": "To mitigate this vulnerability, users should avoid opening TIF image files from untrusted or unknown sources. As this flaw requires user interaction to open a malicious file, exercising caution with file origins can prevent exploitation."}, "name": "CVE-2026-18303", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "gimp", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "gimp", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "gimp:2.8/gimp", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "gimp", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-20T16:23:19Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-18303\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-18303\nhttps://gitlab.gnome.org/GNOME/gimp/-/commit/5633b362026c6e5b2beb559a10cd76fa32a47592\nhttps://www.zerodayinitiative.com/advisories/ZDI-26-456/"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "3.2.2"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "GIMP", "source": "cna", "vendor": "GIMP"}, "product": "gimp", "vendor": "gimp"}], "created": "2026-08-20T18:45:02.953050+00:00", "updated": "2026-08-22T02:00:17.881403+00:00", "vendors": ["gimp", "gimp$PRODUCT$gimp"]}