p PatchFirst

CVE-2026-58471

CVE-2026-58471 · GNU Wget 1.25.0 Heap Buffer Overflow via convert_fname() in url.c

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 6.0 · Medium · EPSS 0.4% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • wget

    Versions
    • ≥ 0, ≤ 1.25.0: Affected (semver)
    • c2640fe5171c59f87c58dc9fcb195b2d18b010ee: Not affected (git)

    No fix published

  • wget Debian:12

    Versions
    • 1.21.3-1
    • 1.21.3-1+deb12u1
    • 1.21.4-1
    • 1.24.5-1
    • 1.24.5-2
    • 1.25.0-1
    • 1.25.0-2
    • 1.25.0-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • wget Debian:13

    Versions
    • 1.25.0-2
    • 1.25.0-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • wget Debian:14

    Versions
    • 1.25.0-2
    • 1.25.0-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • wget Ubuntu:Pro:18.04:LTS

    Versions
    • 1.19.1-3ubuntu1
    • 1.19.1-3ubuntu1.1
    • 1.19.2-1ubuntu1
    • 1.19.3-2ubuntu1
    • 1.19.4-1ubuntu2
    • 1.19.4-1ubuntu2.1
    • 1.19.4-1ubuntu2.2
    • 1.19.4-1ubuntu2.2+esm1
    Affected ranges
    • ECOSYSTEM: < 1.19.4-1ubuntu2.2+esm3

    Update to 1.19.4-1ubuntu2.2+esm3

  • wget Ubuntu:Pro:20.04:LTS

    Versions
    • 1.20.3-1ubuntu1
    • 1.20.3-1ubuntu2
    • 1.20.3-1ubuntu2.1
    Affected ranges
    • ECOSYSTEM: < 1.20.3-1ubuntu2.1+esm2

    Update to 1.20.3-1ubuntu2.1+esm2

  • wget Ubuntu:22.04:LTS

    Versions
    • 1.21-1ubuntu3
    • 1.21-1ubuntu4
    • 1.21-1ubuntu5
    • 1.21.2-2ubuntu1
    • 1.21.2-2ubuntu1.1
    Affected ranges
    • ECOSYSTEM: < 1.21.2-2ubuntu1.3

    Update to 1.21.2-2ubuntu1.3

  • wget Ubuntu:24.04:LTS

    Versions
    • 1.21.3-1ubuntu1
    • 1.21.4-1ubuntu1
    • 1.21.4-1ubuntu2
    • 1.21.4-1ubuntu3
    • 1.21.4-1ubuntu4
    • 1.21.4-1ubuntu4.1
    Affected ranges
    • ECOSYSTEM: < 1.21.4-1ubuntu4.3

    Update to 1.21.4-1ubuntu4.3

  • wget Ubuntu:25.10

    Versions
    • 1.24.5-2ubuntu1
    • 1.25.0-2ubuntu1
    • 1.25.0-2ubuntu2
    • 1.25.0-2ubuntu3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • wget Ubuntu:26.04:LTS

    Versions
    • 1.25.0-2ubuntu3
    • 1.25.0-2ubuntu4
    Affected ranges
    • ECOSYSTEM: < 1.25.0-2ubuntu4.2

    Update to 1.25.0-2ubuntu4.2

Original sources

Check your server →