Red Hat Security Advisory: libsoup3 security update

Fixed packages 5

Vulnerabilities 2

• High 8.6
  CVE-2026-0719

  Libsoup: signed to unsigned conversion error leading to stack-based buffer overflow in libsoup ntlm authentication

  A flaw was identified in the NTLM authentication handling of the libsoup HTTP library, used by GNOME and other applications for network communication. When processing extremely long passwords, an internal size calculation can overflow due to improper use of s…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 6 Linux Debian Ubuntu
  Jan 8, 2026
• High 8.6
  CVE-2026-1761

  Libsoup: stack-based buffer overflow in libsoup multipart response parsingmultipart http response

  A flaw was found in libsoup. This stack-based buffer overflow vulnerability occurs during the parsing of multipart HTTP responses due to an incorrect length calculation. A remote attacker can exploit this by sending a specially crafted multipart HTTP response…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 6 Linux Debian Ubuntu Azure Linux
  Feb 2, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2427906
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2435961
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_2006.json
• report
  https://access.redhat.com/security/cve/CVE-2026-0719
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-0719
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-0719
• article
  https://gitlab.gnome.org/GNOME/libsoup/-/issues/477
• report
  https://access.redhat.com/security/cve/CVE-2026-1761
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-1761
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-1761
• article
  https://gitlab.gnome.org/GNOME/libsoup/-/issues/493