CVE-2026-78663 Affecting go1.26-openssl-race package, versions <1.26.10-150600.13.18.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.57% (46th percentile)

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  • Snyk IDSNYK-SLES157-GO126OPENSSLRACE-21461134
  • published23 Oct 2026
  • disclosed22 Oct 2026

Introduced: 22 Oct 2026

NewCVE-2026-78663  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 go1.26-openssl-race to version 1.26.10-150600.13.18.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream go1.26-openssl-race package and not the go1.26-openssl-race package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1