CVE catalog
CVE-2026-15711
A vulnerability was found in libsoup's WebSocket frame parsing implementation. The library fails to validate length rules specified in RFC 6455 §5.5, which mandates that all WebSocket control frames (
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.74% · Oct 25, 2026
A vulnerability was found in libsoup's WebSocket frame parsing implementation. The library fails to validate length rules specified in RFC 6455 §5.5, which mandates that all WebSocket control frames (e.g., PING, PONG, CLOSE) contain a payload of 125 bytes or less. A remote, unauthenticated attacker can exploit this by sending a non-compliant, oversized control frame. Because the parser handles this protocol violation improperly instead of throwing an immediate connection termination error, it triggers a internal processing crash, resulting in a remote denial of service (DoS) for applications utilizing libsoup WebSockets.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | libsoup3 | sid | 3.8.0-3 | fixed |
| Debian | libsoup3 | forky | 3.8.0-3 | fixed |
| Debian | libsoup3 | trixie | 3.6.5-3 | vulnerable |
| Debian | libsoup3 | bookworm | 3.2.3-0+deb12u2 | vulnerable |
| Debian | libsoup2.4 | trixie | 2.74.3-10.1 | vulnerable |
| Debian | libsoup2.4 | bookworm | 2.74.3-1+deb12u1 | vulnerable |
| Suse | libsoup | linux enterprise high performance computing 15 sp4-espos | 3.0.4-150400.3.52.1 | fixed |
| Suse | libsoup | linux enterprise high performance computing 15 sp4-ltss | 3.0.4-150400.3.52.1 | fixed |
| Suse | libsoup | linux enterprise high performance computing 15 sp5-espos | 3.0.4-150400.3.52.1 | fixed |
| Suse | libsoup | linux enterprise high performance computing 15 sp5-ltss | 3.0.4-150400.3.52.1 | fixed |
| Suse | libsoup | linux enterprise server 15 sp4-ltss | 3.0.4-150400.3.52.1 | fixed |
| Suse | libsoup | linux enterprise server 15 sp5-ltss | 3.0.4-150400.3.52.1 | fixed |
| Suse | libsoup | linux enterprise server for sap applications 15 sp4 | 3.0.4-150400.3.52.1 | fixed |
| Suse | libsoup | linux enterprise server for sap applications 15 sp5 | 3.0.4-150400.3.52.1 | fixed |
| Ubuntu | libsoup2.4 | pro | 2.74.3-10.1ubuntu4 | vulnerable |
| Ubuntu | libsoup2.4 | pro | 2.74.3-10.1ubuntu5 | vulnerable |
| Ubuntu | libsoup2.4 | pro | 2.74.3-10.1ubuntu5+esm1 | vulnerable |
| Ubuntu | libsoup2.4 | pro | 2.74.3-10.1ubuntu5+esm2 | vulnerable |
| Ubuntu | libsoup2.4 | pro | 2.74.3-10.1ubuntu5+esm3 | vulnerable |
| Ubuntu | libsoup2.4 | 22.04 | 2.72.0-3ubuntu3 | vulnerable |
| Ubuntu | libsoup2.4 | 22.04 | 2.74.1-1 | vulnerable |
| Ubuntu | libsoup2.4 | 22.04 | 2.74.2-2 | vulnerable |
| Ubuntu | libsoup2.4 | 22.04 | 2.74.2-3 | vulnerable |
| Ubuntu | libsoup2.4 | 22.04 | 2.74.2-3ubuntu0.1 | vulnerable |
| Ubuntu | libsoup2.4 | 22.04 | 2.74.2-3ubuntu0.2 | vulnerable |
| Ubuntu | libsoup2.4 | 22.04 | 2.74.2-3ubuntu0.3 | vulnerable |
| Ubuntu | libsoup2.4 | 22.04 | 2.74.2-3ubuntu0.4 | vulnerable |
| Ubuntu | libsoup2.4 | 22.04 | 2.74.2-3ubuntu0.5 | vulnerable |
| Ubuntu | libsoup2.4 | 22.04 | 2.74.2-3ubuntu0.6 | vulnerable |
| Ubuntu | libsoup2.4 | 22.04 | 2.74.2-3ubuntu0.7 | vulnerable |
| Ubuntu | libsoup2.4 | 22.04 | 2.74.2-3ubuntu0.8 | vulnerable |
| Ubuntu | libsoup2.4 | 22.04 | 2.74.2-3ubuntu0.9 | vulnerable |
| Ubuntu | libsoup3 | pro | 3.0.4-2 | vulnerable |
| Ubuntu | libsoup3 | pro | 3.0.4-3 | vulnerable |
| Ubuntu | libsoup3 | pro | 3.0.5-1 | vulnerable |
| Ubuntu | libsoup3 | pro | 3.0.7-0ubuntu1 | vulnerable |
| Ubuntu | libsoup3 | pro | 3.0.7-0ubuntu1+esm1 | vulnerable |
| Ubuntu | libsoup3 | pro | 3.0.7-0ubuntu1+esm2 | vulnerable |
| Ubuntu | libsoup3 | pro | 3.0.7-0ubuntu1+esm3 | vulnerable |
| Ubuntu | libsoup3 | pro | 3.0.7-0ubuntu1+esm4 | vulnerable |
| Ubuntu | libsoup3 | pro | 3.0.7-0ubuntu1+esm5 | vulnerable |
| Ubuntu | libsoup3 | pro | 3.0.7-0ubuntu1+esm6 | vulnerable |
| Ubuntu | libsoup3 | pro | 3.0.7-0ubuntu1+esm7 | vulnerable |
| Ubuntu | libsoup3 | pro | 3.0.7-0ubuntu1+esm8 | vulnerable |
| Ubuntu | libsoup3 | pro | 3.0.7-0ubuntu1+esm9 | vulnerable |
| Ubuntu | libsoup2.4 | 24.04 | 2.74.3-1 | vulnerable |
| Ubuntu | libsoup2.4 | 24.04 | 2.74.3-2 | vulnerable |
| Ubuntu | libsoup2.4 | 24.04 | 2.74.3-3 | vulnerable |
| Ubuntu | libsoup2.4 | 24.04 | 2.74.3-6 | vulnerable |
| Ubuntu | libsoup2.4 | 24.04 | 2.74.3-6build1 | vulnerable |
| Ubuntu | libsoup2.4 | 24.04 | 2.74.3-6ubuntu1 | vulnerable |
| Ubuntu | libsoup2.4 | 24.04 | 2.74.3-6ubuntu1.1 | vulnerable |
| Ubuntu | libsoup2.4 | 24.04 | 2.74.3-6ubuntu1.2 | vulnerable |
| Ubuntu | libsoup2.4 | 24.04 | 2.74.3-6ubuntu1.3 | vulnerable |
| Ubuntu | libsoup2.4 | 24.04 | 2.74.3-6ubuntu1.4 | vulnerable |
| Ubuntu | libsoup2.4 | 24.04 | 2.74.3-6ubuntu1.5 | vulnerable |
| Ubuntu | libsoup2.4 | 24.04 | 2.74.3-6ubuntu1.6 | vulnerable |
| Ubuntu | libsoup2.4 | 24.04 | 2.74.3-6ubuntu1.7 | vulnerable |
| Ubuntu | libsoup2.4 | 24.04 | 2.74.3-6ubuntu1.8 | vulnerable |
| Ubuntu | libsoup2.4 | 24.04 | 2.74.3-6ubuntu1.9 | vulnerable |
| Ubuntu | libsoup3 | 24.04 | 3.4.2-4 | vulnerable |
| Ubuntu | libsoup3 | 24.04 | 3.4.4-1 | vulnerable |
| Ubuntu | libsoup3 | 24.04 | 3.4.4-2 | vulnerable |
| Ubuntu | libsoup3 | 24.04 | 3.4.4-4 | vulnerable |
| Ubuntu | libsoup3 | 24.04 | 3.4.4-5 | vulnerable |
| Ubuntu | libsoup3 | 24.04 | 3.4.4-5build1 | vulnerable |
| Ubuntu | libsoup3 | 24.04 | 3.4.4-5build2 | vulnerable |
| Ubuntu | libsoup3 | 24.04 | 3.4.4-5ubuntu0.1 | vulnerable |
| Ubuntu | libsoup3 | 24.04 | 3.4.4-5ubuntu0.2 | vulnerable |
| Ubuntu | libsoup3 | 24.04 | 3.4.4-5ubuntu0.3 | vulnerable |
| Ubuntu | libsoup3 | 24.04 | 3.4.4-5ubuntu0.4 | vulnerable |
| Ubuntu | libsoup3 | 24.04 | 3.4.4-5ubuntu0.5 | vulnerable |
| Ubuntu | libsoup3 | 24.04 | 3.4.4-5ubuntu0.6 | vulnerable |
| Ubuntu | libsoup3 | 24.04 | 3.4.4-5ubuntu0.7 | vulnerable |
| Ubuntu | libsoup3 | 24.04 | 3.4.4-5ubuntu0.8 | vulnerable |
| Ubuntu | libsoup3 | 24.04 | 3.4.4-5ubuntu0.9 | vulnerable |
| Ubuntu | libsoup2.4 | 26.10 | 2.74.3-10.1ubuntu5 | vulnerable |
| Ubuntu | libsoup3 | 26.10 | 3.6.6-1 | vulnerable |
| Ubuntu | libsoup3 | 26.10 | 3.6.6-1ubuntu3 | vulnerable |
| Ubuntu | libsoup3 | 26.04 | 3.6.5-4 | vulnerable |
| Ubuntu | libsoup3 | 26.04 | 3.6.5-5 | vulnerable |
| Ubuntu | libsoup3 | 26.04 | 3.6.5-6 | vulnerable |
| Ubuntu | libsoup3 | 26.04 | 3.6.5-7 | vulnerable |
| Ubuntu | libsoup3 | 26.04 | 3.6.5-9 | vulnerable |
| Ubuntu | libsoup3 | 26.04 | 3.6.6-1 | vulnerable |
| Ubuntu | libsoup3 | 26.04 | 3.6.6-1ubuntu0.1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libsoup3 | source | sid | 3.8.0-1 | not yet assigned | Not reported | [1142840] |
| Debian | libsoup3 | source | forky | 3.8.0-1 | not yet assigned | Not reported | [1142840] |
| Debian | libsoup3 | source | trixie | (unfixed) | not yet assigned | Not reported | [1142840] |
| Debian | libsoup3 | source | bookworm | (unfixed) | not yet assigned | Not reported | [1142840] |
| Debian | libsoup2.4 | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | libsoup2.4 | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Suse | libsoup | rpm | linux enterprise high performance computing 15 sp4-espos | 3.0.4-150400.3.52.1 | Not reported | SUSE-SU-2026:4557-1 | Not reported |
| Suse | libsoup | rpm | linux enterprise high performance computing 15 sp4-ltss | 3.0.4-150400.3.52.1 | Not reported | SUSE-SU-2026:4557-1 | Not reported |
| Suse | libsoup | rpm | linux enterprise high performance computing 15 sp5-espos | 3.0.4-150400.3.52.1 | Not reported | SUSE-SU-2026:4557-1 | Not reported |
| Suse | libsoup | rpm | linux enterprise high performance computing 15 sp5-ltss | 3.0.4-150400.3.52.1 | Not reported | SUSE-SU-2026:4557-1 | Not reported |
| Suse | libsoup | rpm | linux enterprise server 15 sp4-ltss | 3.0.4-150400.3.52.1 | Not reported | SUSE-SU-2026:4557-1 | Not reported |
| Suse | libsoup | rpm | linux enterprise server 15 sp5-ltss | 3.0.4-150400.3.52.1 | Not reported | SUSE-SU-2026:4557-1 | Not reported |
| Suse | libsoup | rpm | linux enterprise server for sap applications 15 sp4 | 3.0.4-150400.3.52.1 | Not reported | SUSE-SU-2026:4557-1 | Not reported |
| Suse | libsoup | rpm | linux enterprise server for sap applications 15 sp5 | 3.0.4-150400.3.52.1 | Not reported | SUSE-SU-2026:4557-1 | Not reported |
Notes
[trixie] libsoup3: Minor issue [bookworm] libsoup3: Limited support [trixie] libsoup2.4: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [gir1.2-soup-2.4]Affected
Source package: [libsoup2.4]
Details (2)
2.74.3-1+deb12u1· amd64 · bookwormAffected
nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
2.74.3-1+deb12u1· arm64 · bookwormAffected
nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
- [gir1.2-soup-3.0]Affected
Source package: [libsoup3]
Details (2)
3.2.3-0+deb12u2· amd64 · bookwormAffected
nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
3.2.3-0+deb12u2· arm64 · bookwormAffected
nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
- [libsoup2.4-1]Affected
Source package: [libsoup2.4]
Details (2)
2.74.3-1+deb12u1· amd64 · bookwormAffected
nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
2.74.3-1+deb12u1· arm64 · bookwormAffected
nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
- [libsoup2.4-common]Affected
Source package: [libsoup2.4]
Details (2)
2.74.3-1+deb12u1· all · bookwormAffected
nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
2.74.3-1+deb12u1· all · bookwormAffected
nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
- [libsoup2.4-dev]Affected
Source package: [libsoup2.4]
Details (2)
2.74.3-1+deb12u1· amd64 · bookwormAffected
nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
2.74.3-1+deb12u1· arm64 · bookwormAffected
nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
- [libsoup2.4-doc]Affected
Source package: [libsoup2.4]
Details (2)
2.74.3-1+deb12u1· all · bookwormAffected
nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
2.74.3-1+deb12u1· all · bookwormAffected
nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
- [libsoup2.4-tests]Affected
Source package: [libsoup2.4]
Details (2)
2.74.3-1+deb12u1· amd64 · bookwormAffected
nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
2.74.3-1+deb12u1· arm64 · bookwormAffected
nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
- [libsoup-3.0-0]Affected
Source package: [libsoup3]
Details (2)
3.2.3-0+deb12u2· amd64 · bookwormAffected
nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
3.2.3-0+deb12u2· arm64 · bookwormAffected
nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
- [libsoup-3.0-common]Affected
Source package: [libsoup3]
Details (2)
3.2.3-0+deb12u2· all · bookwormAffected
nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
3.2.3-0+deb12u2· all · bookwormAffected
nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
- [libsoup-3.0-dev]Affected
Source package: [libsoup3]
Details (2)
3.2.3-0+deb12u2· amd64 · bookwormAffected
nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
3.2.3-0+deb12u2· arm64 · bookwormAffected
nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
- [libsoup-3.0-doc]Affected
Source package: [libsoup3]
Details (2)
3.2.3-0+deb12u2· all · bookwormAffected
nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
3.2.3-0+deb12u2· all · bookwormAffected
nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
- [libsoup-3.0-tests]Affected
Source package: [libsoup3]
Details (2)
3.2.3-0+deb12u2· amd64 · bookwormAffected
nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
3.2.3-0+deb12u2· arm64 · bookwormAffected
nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
- [libsoup-gnome2.4-1]Affected
Source package: [libsoup2.4]
Details (2)
2.74.3-1+deb12u1· amd64 · bookwormAffected
nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
2.74.3-1+deb12u1· arm64 · bookwormAffected
nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
- [libsoup-gnome2.4-dev]Affected
Source package: [libsoup2.4]
Details (2)
2.74.3-1+deb12u1· amd64 · bookwormAffected
nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
2.74.3-1+deb12u1· arm64 · bookwormAffected
nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
[Debian 13 (Trixie)]
- [gir1.2-soup-2.4]Affected
Source package: [libsoup2.4]
Details (2)
2.74.3-10.1· amd64 · trixieAffected
nvd · libsoup2.4 · debian · 13
2.74.3-10.1· arm64 · trixieAffected
nvd · libsoup2.4 · debian · 13
- [gir1.2-soup-3.0]Affected
Source package: [libsoup3]
Details (2)
3.6.5-3· amd64 · trixieAffected
nvd · libsoup3 · debian · 13
3.6.5-3· arm64 · trixieAffected
nvd · libsoup3 · debian · 13
- [libsoup-2.4-1]Affected
Source package: [libsoup2.4]
Details (2)
2.74.3-10.1· amd64 · trixieAffected
nvd · libsoup2.4 · debian · 13
2.74.3-10.1· arm64 · trixieAffected
nvd · libsoup2.4 · debian · 13
- [libsoup2.4-common]Affected
Source package: [libsoup2.4]
Details (2)
2.74.3-10.1· all · trixieAffected
nvd · libsoup2.4 · debian · 13
2.74.3-10.1· all · trixieAffected
nvd · libsoup2.4 · debian · 13
- [libsoup2.4-dev]Affected
Source package: [libsoup2.4]
Details (2)
2.74.3-10.1· amd64 · trixieAffected
nvd · libsoup2.4 · debian · 13
2.74.3-10.1· arm64 · trixieAffected
nvd · libsoup2.4 · debian · 13
- [libsoup2.4-doc]Affected
Source package: [libsoup2.4]
Details (2)
2.74.3-10.1· all · trixieAffected
nvd · libsoup2.4 · debian · 13
2.74.3-10.1· all · trixieAffected
nvd · libsoup2.4 · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2026_68234.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-15711]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-15711]
- [https://osv.dev/vulnerability/SUSE-SU-2026:4557-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-15711]
- [https://security-tracker.debian.org/tracker/CVE-2026-15711]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-15711.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2919.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]