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{"bugzilla": {"description": "wget: GNU Wget: Heap buffer overflow via server-supplied filename leads to memory corruption", "id": "2497850", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2497850"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H", "status": "draft"}, "cwe": "CWE-122", "details": ["GNU Wget through 1.25.0, fixed in commit c2640fe, contains a heap buffer overflow vulnerability in the convert_fname() function within src/url.c that allows remote attackers to trigger memory corruption through a server-supplied filename requiring character set conversion. When the output buffer is too small during iconv E2BIG reallocation, the reallocation logic miscalculates the remaining space, leading to a heap buffer overflow that can be exploited via a maliciously crafted server response.", "A flaw was found in GNU Wget. A remote attacker can exploit a heap buffer overflow vulnerability in the convert_fname() function. This occurs when processing a server-supplied filename that requires character set conversion, leading to memory corruption due to incorrect buffer reallocation. This can result in a denial of service or other impacts."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, always use the -O (or --output-document) flag in your scripts to explicitly define the local filename. This forces wget to ignore the server's provided filename, completely bypassing the vulnerable code path."}, "name": "CVE-2026-58471", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "wget", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "wget", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "wget", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "wget", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "wget", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-07T19:47:47Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-58471\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-58471\nhttps://gitlab.com/gnuwget/wget/-/commit/c2640fe5171c59f87c58dc9fcb195b2d18b010ee\nhttps://www.vulncheck.com/advisories/gnu-wget-heap-buffer-overflow-via-convert-fname-in-url-c"], "statement": "Moderate: A heap buffer overflow in GNU Wget, affecting Red Hat Enterprise Linux and other products, can be triggered by a remote attacker. This flaw occurs when `wget` processes a specially crafted server-supplied filename that requires character set conversion, leading to memory corruption. Successful exploitation requires user interaction with a malicious server and could result in a denial of service or potentially other impacts.", "threat_severity": "Moderate"}

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