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GNU Wget through 1.25.0, fixed in commit dd692d9, contains a heap buffer overflow vulnerability in the html_quote_string() function in src/convert.c that allows a remote attacker to trigger memory corruption by supplying a crafted HTML attribute with a large number of characters requiring entity encoding. A server-supplied HTML attribute causes a signed integer counter to overflow during output size accumulation, resulting in an undersized heap allocation and subsequent heap buffer overflow during the copy phase.
This issue has been addressed in the following products: Red Hat Enterprise Linux 10 Via RHSA-2026:62142 https://access.redhat.com/errata/RHSA-2026:62142
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2026:62143 https://access.redhat.com/errata/RHSA-2026:62143
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2026:62144 https://access.redhat.com/errata/RHSA-2026:62144