GHSA-4374-p667-p6c8 · Severity: high · Ecosystem: go — HTTP/2 rapid reset can cause excessive work in net/http
A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption. While the total number of requests is bounded by the http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create a new request while the existing one is still executing. With the fix applied, HTTP/2 servers now bound the number of simultaneously executing handler goroutines to the stream concurrency limit (MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows too large, the server will terminate the connection. This issue is also fixed in golang.org/x/net/http2 for users manually configuring HTTP/2. The default stream concurrency limit is 250 streams (requests) per HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see the Server.MaxConcurrentStreams setting and the ConfigureServer function.
Conclusion & alert: CVE-2023-39325 is rated Moderate Risk (64.6/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.80%). Core evidence: EPSS rose +3.65% over the last day, indicating growing attacker interest. Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.15% | 3.80% | +3.65% |
| 2 | 2026-03-04 | 0.09% | 0.15% | +0.06% |
| 3 | 2026-03-01 | — | 0.09% | — |
Full EPSS history (44 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
GHSA-4374-p667-p6c8 · Severity: high · Ecosystem: go — HTTP/2 rapid reset can cause excessive work in net/http
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2023-39325: 1 source package rows (go); 30 state rows across 6 repos (3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 6, open 24. | https://security.alpinelinux.org/vuln/CVE-2023-39325 |
debian
|
not yet assigned | CVE-2023-39325 not yet assigned priority: Debian including 2 source packages (golang-1.15, golang-1.19), 2 status rows across 2 suites (bookworm, bullseye): open 2. | https://security-tracker.debian.org/tracker/CVE-2023-39325 |
gentoo
|
high | CVE-2023-39325: 1 GLSA(s) (202311-09), 1 atom(s) (dev-lang/go); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2023-39325 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2023-39325 |
suse
|
high | CVE-2023-39325 severity important: SUSE including 206 source package names (1.21-2.34.5:go1.21-1.21.3-150000.1.12.1, 1.21-2.34.5:go1.21-doc-1.21.3-150000.1.12.1, …), 911 product×package rows across 80 product lines (Container bci/golang, Container suse/kubectl, … (80 product lines)): Known Not Affected 538, Fixed 337, Will Not Fix 36. | https://www.suse.com/security/cve/CVE-2023-39325/ |
ubuntu
|
medium | CVE-2023-39325 medium priority: Ubuntu including 13 source packages (golang, golang-1.10, …), 156 status rows across 12 suites (bionic, focal, jammy, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 106, needs-triage 24, released 15, ignored 10, not-affected 1. | https://ubuntu.com/security/CVE-2023-39325 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| golang | go | >= 1.20.0, < 1.20.10 | cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* |
| golang | go | >= 1.21.0, < 1.21.3 | cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* |
| golang | http2 | < 0.17.0 | cpe:2.3:a:golang:http2:*:*:*:*:*:go:*:* |
| fedoraproject | fedora | 37 | cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* |
| fedoraproject | fedora | 38 | cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* |
| fedoraproject | fedora | 39 | cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* |
| netapp | astra_trident | — | cpe:2.3:a:netapp:astra_trident:-:*:*:*:*:*:*:* |
| netapp | astra_trident_autosupport | — | cpe:2.3:a:netapp:astra_trident_autosupport:-:*:*:*:*:*:*:* |