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CVE-2026-66337— Libsoup: libsoup: heap buffer over-read via integer underflow in soup_filter_input_stream_read_until()

CVSS 6.5 · Medium EPSS 0.23% · P14

Affected Version Matrix 5

VendorProductVersion RangeStatus
Red HatRed Hat Enterprise Linux 10anyaffected
Red HatRed Hat Enterprise Linux 6anyaffected
Red HatRed Hat Enterprise Linux 7anyaffected
Red HatRed Hat Enterprise Linux 8anyaffected
Red HatRed Hat Enterprise Linux 9anyaffected
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I. Basic Information for CVE-2026-66337

Vulnerability Information
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Vulnerability Title
Libsoup: libsoup: heap buffer over-read via integer underflow in soup_filter_input_stream_read_until()
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in libsoup. An unsigned integer underflow in the soup_filter_input_stream_read_until() function causes a heap buffer over-read when parsing multipart HTTP responses. A malicious HTTP server can exploit this by sending a crafted multipart response, potentially causing the client application to crash or disclose sensitive heap memory.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
Red HatRed Hat Enterprise Linux 10-cpe:/o:redhat:enterprise_linux:10
Red HatRed Hat Enterprise Linux 6-cpe:/o:redhat:enterprise_linux:6
Red HatRed Hat Enterprise Linux 7-cpe:/o:redhat:enterprise_linux:7
Red HatRed Hat Enterprise Linux 8-cpe:/o:redhat:enterprise_linux:8
Red HatRed Hat Enterprise Linux 9-cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2026-66337

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III. Intelligence Information for CVE-2026-66337

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Vendor Advisories for CVE-2026-66337 (2)

Same Patch Batch · Red Hat · 2026-07-24 · 10 CVEs total

CVE-2026-171078.5 HIGHCluster-proxy: cluster-proxy: impersonation header injection in service-proxy grants clust
CVE-2026-663396.5 MEDIUMLibsoup: libsoup: proxy credentials leak to destination server via proxy-authorization hea
CVE-2026-170596.5 MEDIUMKeycloak-services: keycloak-services: information disclosure via role-users endpoint bypas
CVE-2026-170485.5 MEDIUMKeycloak-services: keycloak-services: vault-resolved rotated client secrets leaked via adm
CVE-2026-167435.5 MEDIUMAccountsservice: accountsservice: arbitrary file read via seticonfile for systemd-homed us
CVE-2026-167305.5 MEDIUMDbus-broker: dbus-broker: session bus denial of service via emfile during peer setup
CVE-2026-169105.5 MEDIUMQuay: ssrf in red hat quay notification webhooks (slack/generic)
CVE-2026-663385.4 MEDIUMLibsoup: libsoup: http request smuggling via permissive chunk-size parsing in soup_body_in
CVE-2026-170393.1 LOWPki-core: dogtag-pki: redhat-pki: pki-core: ca renewal request processing omits realm auth

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-125

V. Comments for CVE-2026-66337

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