Medium [CVE-2026-58470] Integer overflow in Content-Range header parsing causes download desynchronization
This medium-severity Red Hat Linux advisory covers CVE-2026-58470 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7.
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Summary
GNU Wget through 1.25.0, fixed in commit 43d3ba9, contains an integer overflow vulnerability in the parse_content_range() function within src/http.c that allows server-controlled values to cause signed integer arithmetic to overflow.
Attackers can supply malicious Content-Range header values to trigger undefined behavior and download desynchronization in the affected client. An integer overflow in GNU Wget's parse_content_range() function allows malicious servers to send crafted Content-Range headers.
This triggers undefined behavior and download desynchronization, potentially causing a denial of service or data integrity issues for the client. Moderate: GNU Wget is vulnerable to a client-side integer overflow in its Content-Range header processing.
If a client connects to an attacker-controlled server, the server can return anomalous headers that cause undefined behavior and stream desynchronization. This results in local data integrity issues or a denial of service, though the impact is strictly limited to the Wget process itself.
Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L). Weakness: CWE-190.
Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
Affected products named by the advisory: Red Hat package: wget.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 10 days ago·verify at source
Mitigation checklist
- To mitigate this issue, users should avoid using `wget` to download content from untrusted or unverified sources. When `wget` is used in automated scripts or environments, ensure that the target servers are trusted to prevent exposure to malicious `Content-Range` headers. Restricting network access for `wget` to only trusted hosts can also reduce the attack surface.
Official advisory · high-confidence parse· fetched 10 days ago·verify at source
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