GHSA-4v7x-pqxf-cx7m · Severity: medium · Ecosystem: go — net/http, x/net/http2: close connections when receiving too many headers
An attacker may cause an HTTP/2 endpoint to read arbitrary amounts of header data by sending an excessive number of CONTINUATION frames. Maintaining HPACK state requires parsing and processing all HEADERS and CONTINUATION frames on a connection. When a request's headers exceed MaxHeaderBytes, no memory is allocated to store the excess headers, but they are still parsed. This permits an attacker to cause an HTTP/2 endpoint to read arbitrary amounts of header data, all associated with a request which is going to be rejected. These headers can include Huffman-encoded data which is significantly more expensive for the receiver to decode than for an attacker to send. The fix sets a limit on the amount of excess header frames we will process before closing a connection.
Conclusion & alert: CVE-2023-45288 is rated High Risk (69.6/100): CVSS High severity, with high exploitation likelihood (EPSS 75.27%, 99th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +5.36% over the last day, indicating growing attacker interest. Mandatory action: High exploitation likelihood—assess exposure and prioritize 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 | 2026-06-03 | 69.91% | 75.27% | +5.36% |
| 2 | 2026-05-26 | 64.85% | 69.91% | +5.05% |
| 3 | 2026-05-22 | — | 64.85% | — |
Full EPSS history (56 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 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
GHSA-4v7x-pqxf-cx7m · Severity: medium · Ecosystem: go — net/http, x/net/http2: close connections when receiving too many headers
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2023-45288: 3 source package rows (forgejo, go, rclone); 11 state rows across 5 repos (3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 11, open 0. | https://security.alpinelinux.org/vuln/CVE-2023-45288 |
debian
|
not yet assigned | CVE-2023-45288 not yet assigned priority: Debian including 3 source packages (golang-1.15, golang-1.19, golang-golang-x-net), 7 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 4, resolved 3. | https://security-tracker.debian.org/tracker/CVE-2023-45288 |
gentoo
|
normal | CVE-2023-45288: 1 GLSA(s) (202408-07), 1 atom(s) (dev-lang/go); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2023-45288 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2023-45288 |
suse
|
medium | CVE-2023-45288 severity moderate: SUSE including 573 source package names (1.21-2.34.5:go1.21-1.21.9-150000.1.30.1, 1.21-2.34.5:go1.21-doc-1.21.9-150000.1.30.1, …), 1597 product×package rows across 375 product lines (Container bci/golang, Container suse/kubectl, … (375 product lines)): Fixed 1199, Known Affected 205, Known Not Affected 193. | https://www.suse.com/security/cve/CVE-2023-45288/ |
ubuntu
|
medium | CVE-2023-45288 medium priority: Ubuntu including 14 source packages (golang, golang-1.10, …), 123 status rows across 11 suites (bionic, focal, jammy, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 79, needs-triage 29, released 7, not-affected 6, ignored 2. | https://ubuntu.com/security/CVE-2023-45288 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| No affected products in dataset. | |||