This update for libsoup2 fixes the following issues:
CVE-2026-12547: Header 'Proxy-Authorization' leads to credentials being send to different proxy after proxy switch
(bsc#1272195).
CVE-2026-15711: SoupWebsocketConnection: WebSocket remote denial of service via oversized control frame protocol
violation (bsc#1271446).
CVE-2026-15713: SoupCache: libsoup: HTTP/2 frame window exhaustion remote denial of service via memory leak
(bsc#1271448).
CVE-2026-15714: SoupMultipartInputStream: libsoup: Out-of-bounds read in soup_multipart_input_stream_read_headers via
an oversized multipart boundary string (bsc#1271449).
CVE-2026-66339: proxy credentials leak to destination server via Proxy-Authorization header in CONNECT tunnels
(bsc#1273156).
CVE-2026-77014: Integer truncation in sort_ranges() comparator causes silent omission of HTTP Range responses
(bsc#1275988).
CVE-2026-77680: quadratic CPU denial of service in HTTP Range coalescing after the CVE-2025-32907 fix (bsc#1276759).
CVE-2026-102556: Heap buffer overflow from WebSocket Pong signal type confusion (bsc#1283300).
CVE-2026-102557: Heap buffer overflow during WebSocket message reassembly (bsc#1283301).
CVE-2026-102558: Heap buffer overflow during WebSocket receive-buffer growth (bsc#1283302).
CVE-2026-102559: Heap buffer overflow during WebSocket client-frame masking (bsc#1283303).
CVE-2026-102560: Heap buffer overflow during outgoing permessage-deflate buffer growth (bsc#1283304).
CVE-2026-103399: incomplete request body draining in HTTP/1.x early responses can allow HTTP request smuggling
(bsc#1283831).