DEBIAN-CVE-2026-78663

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Source

https://security-tracker.debian.org/tracker/CVE-2026-78663

Import Source

https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-78663.json

JSON Data

https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-78663

Upstream

CVE-2026-78663

Published

2026-10-08T23:17:03Z

Modified

2026-10-12T22:00:13Z

Severity

9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H CVSS Calculator

Summary

[none]

Details

The HTTP/2 server can refund connection-level flow control twice for the same data: Once when a client resets a stream (refunding data for any sent-but-unread portion of the stream), and again when a request handler reads the buffered data. A malicious client can exploit this to bypass the configured connection-level flow control limit (MaxReceiveBufferPerConnection). Total buffered data is still limited by the concurrent stream limit and stream-level flow control.

References

https://security-tracker.debian.org/tracker/CVE-2026-78663

Affected packages

Debian:12

golang-1.19

Package

Name: golang-1.19
Purl: pkg:deb/debian/golang-1.19?arch=source&distro=bookworm

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.19.8-2

1.19.9-1

1.19.10-1

1.19.10-2

1.19.11-1

1.19.12-1

1.19.12-2~bpo11+1

1.19.12-2~bpo12+1

1.19.12-2

1.19.13-1~bpo11+1

1.19.13-1~bpo12+1

1.19.13-1

Ecosystem specific

{
    "urgency":  "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-78663.json"

golang-golang-x-net

Package

Name: golang-golang-x-net
Purl: pkg:deb/debian/golang-golang-x-net?arch=source&distro=bookworm

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1:0.*

1:0.7.0+dfsg-1

1:0.10.0-1

1:0.11.0-1

1:0.14.0-1

1:0.15.0-1

1:0.15.0-2

1:0.17.0+dfsg-1

1:0.19.0+dfsg-1

1:0.20.0+dfsg-1

1:0.21.0+dfsg-1

1:0.22.0+dfsg-1

1:0.23.0+dfsg-1

1:0.24.0+dfsg-1

1:0.25.0+dfsg-1

1:0.26.0+dfsg-1

1:0.26.0+dfsg-2

1:0.27.0-1

1:0.27.0-2

1:0.47.0-1

1:0.47.0-2

1:0.53.0-1

1:0.53.0-2~bpo13+1

1:0.53.0-2

1:0.55.0-1

1:0.56.0-1

1:0.57.0-1

1:0.58.0-1

1:0.60.0-1

Ecosystem specific

{
    "urgency":  "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-78663.json"

Debian:13

golang-1.24

Package

Name: golang-1.24
Purl: pkg:deb/debian/golang-1.24?arch=source&distro=trixie

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.24.4-1

1.24.4-2

1.24.4-3

1.24.4-4

1.24.7-1

1.24.8-1

1.24.9-1

1.24.12-1

1.24.13-1

1.24.13-2

Ecosystem specific

{
    "urgency":  "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-78663.json"

golang-golang-x-net

Package

Name: golang-golang-x-net
Purl: pkg:deb/debian/golang-golang-x-net?arch=source&distro=trixie

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1:0.*

1:0.27.0-2

1:0.47.0-1

1:0.47.0-2

1:0.53.0-1

1:0.53.0-2~bpo13+1

1:0.53.0-2

1:0.55.0-1

1:0.56.0-1

1:0.57.0-1

1:0.58.0-1

1:0.60.0-1

Ecosystem specific

{
    "urgency":  "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-78663.json"

Debian:14

golang-1.26

Package

Name: golang-1.26
Purl: pkg:deb/debian/golang-1.26?arch=source&distro=forky

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.26.9-1

Affected versions

1.*

1.26~rc2-1

1.26~rc3-1

1.26~rc3-2

1.26.0-1

1.26.1-1

1.26.2-1

1.26.2-2

1.26.2-3

1.26.3-1~bpo13+1

1.26.3-1

1.26.3-2~bpo13+1

1.26.3-2

1.26.4-1~bpo13+1

1.26.4-1

1.26.5-1~bpo13+1

1.26.5-1

1.26.6-1

1.26.6-2

1.26.7-1~bpo13+1

1.26.7-1

1.26.8-1~bpo13+1

1.26.8-1

1.26.8-2

Ecosystem specific

{
    "urgency":  "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-78663.json"

golang-1.27

Package

Name: golang-1.27
Purl: pkg:deb/debian/golang-1.27?arch=source&distro=forky

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.27.2-1

Affected versions

1.*

1.27~rc1-1

1.27~rc2-1

1.27~rc3-1

1.27.0-1~bpo13+1

1.27.0-1

1.27.1-1

1.27.1-2~bpo13+1

1.27.1-2

1.27.2-1~bpo13+1

Ecosystem specific

{
    "urgency":  "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-78663.json"

golang-golang-x-net

Package

Name: golang-golang-x-net
Purl: pkg:deb/debian/golang-golang-x-net?arch=source&distro=forky

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1:0.60.0-1

Affected versions

1:0.*

1:0.27.0-2

1:0.47.0-1

1:0.47.0-2

1:0.53.0-1

1:0.53.0-2~bpo13+1

1:0.53.0-2

1:0.55.0-1

1:0.56.0-1

1:0.57.0-1

1:0.58.0-1

Ecosystem specific

{
    "urgency":  "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-78663.json"