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Description

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.

PUBLISHED Reserved 2026-06-30 | Published 2026-07-07 | Updated 2026-07-14 | Assigner VulnCheck




MEDIUM: 6.0CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

MEDIUM: 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H

Problem types

Integer Overflow or Wraparound

Product status

Default status
affected

Any version
affected

dd692d9cea5335b181d877ae917fe6e75587a812 (git)
unaffected

Credits

Tristan Madani finder

References

gitlab.com/...ommit/dd692d9cea5335b181d877ae917fe6e75587a812 (Fix Commit) patch

www.vulncheck.com/...er-overflow-via-html-attribute-encoding third-party-advisory

cve.org (CVE-2026-58472)

nvd.nist.gov (CVE-2026-58472)

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