ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-97032

HTTP/2 servers could end up crashing due to inadvertently modifying its HPACK encoder concurrently.

Published Oct 8, 2026 · catalog updated Oct 16, 2026 · HTTP/2 servers could end

Check if you run it

No confirmed exploitation is on record for CVE-2026-97032. EPSS is 0.42%. Act only if a listed version of HTTP/2 servers could end is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (HTTP/2 servers could end).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.42%
Remediation
Fix linked
Affected products
Go golang.org/x/net · Go stdlib

HTTP/2 servers could end up crashing due to inadvertently modifying its HPACK encoder concurrently. This happens because the server modifies the HPACK encoder from two goroutines without synchronization: one uses the encoder to encode a HEADERS frame as part of a response sent to a client and the other modifies the encoder's table size when handling a SETTINGS frame containing SETTINGS_HEADER_TABLE_SIZE that a client sends. A malicious client can repeatedly send a request while changing the header table size to crash the server.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Go golang.org/x/net0 → 0.60.0
  • Go stdlib0 → 1.26.9
  • Go stdlib1.27.0-0 → 1.27.2

How to fix CVE-2026-97032

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-97032. EPSS is 0.42%. Act only if a listed version of HTTP/2 servers could end is installed.

Which versions are affected?

Compare what you have installed with 0 → 0.60.0, 0 → 1.26.9, 1.27.0-0 → 1.27.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-362: Race Condition. EPSS 0.42%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Related Odoo Git fixes

Quoted Community commit messages that cite this CVE. Presence of a commit is not proof that every edition or backport includes the fix. Enterprise proprietary diffs are never shown here. Timeline

  • Oct 8, 2026 · referenced

    Update to go1.26.9

    Update to go1.26.9 These releases include 15 security fixes following the security policy: - net/http: HTTP/2 server crash due to HPACK encoder race HTTP/2 servers could end up crashing due to inadvertently modifying its HPACK encoder concurrently. This happens because the server modifies the HPACK encoder from two goroutines without synchronization: one uses the encoder to encode a HEADERS frame as part of a response sent to a client and the other modifies the encoder's table size when handling a SETTINGS frame containing SETTINGS_HEADER_TABLE_SIZE that a client sends. A malicious client can repeatedly send a request while changing the header table size to crash the server. Fix this issue by not applying SETTINGS_HEADER_TABLE_SIZE immediately. Instead, buffer any SETTINGS_HEADER_TABLE_SIZE received, and only apply the new value prior to the next time the server writes a…
    https://github.com/moby/moby/commit/3dcf5047a1754f38dfa7e97e4fd156de4aba3808

Timeline

Detection, updates, and resolution for this record.

  1. Oct 8, 2026 · NIST NVD

    Detected

    HTTP/2 servers could end up crashing due to inadvertently modifying its HPACK encoder concurrently. This happens because the server modifies the HPACK encoder from two goroutines without synchronization: one uses the encoder to encode a HEADERS frame as part of a response sent to a client and the other modifies the encoder's table size when handling a SETTINGS frame containing SETTINGS_HEADER_TABL

  2. Oct 15, 2026 · NIST NVD

    Updated

    HTTP/2 servers could end up crashing due to inadvertently modifying its HPACK encoder concurrently. This happens because the server modifies the HPACK encoder from two goroutines without synchronization: one uses the encoder to encode a HEADERS frame as part of a response sent to a client and the other modifies the encoder's table size when handling a SETTINGS frame containing SETTINGS_HEADER_TABL

  3. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    stdlib fixed in 1.26.9; stdlib fixed in 1.27.2; golang.org/x/net fixed in 0.60.0

  4. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    stdlib fixed in 1.26.9

  5. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    stdlib fixed in 1.27.2

  6. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    golang.org/x/net fixed in 0.60.0

  7. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    HTTP/2 servers could end up crashing due to inadvertently modifying its HPACK encoder concurrently. This happens because the server modifies the HPACK encoder from two goroutines without synchronization: one uses the encoder to encode a HEADERS frame as part of a response sent to a client and the other modifies the encoder's table size when handling a SETTINGS frame containing SETTINGS_HEADER_TABL

Sources

  • CVE.orgVulnerability recordCVE-2026-97032

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-97032

    30-day exploitation probability 0.4%

    first.org
  • Go Vulnerability DatabasePackage advisoryGO-2026-6617

    HTTP/2 server crash due to HPACK encoder race in net/http

    osv.dev
  • NIST NVDVulnerability recordCVE-2026-97032

    HTTP/2 servers could end up crashing due to inadvertently modifying its HPACK encoder concurrently. This happens because the server modifies the HPACK encoder from two goroutines without synchronization: one uses the encoder to encode a HEADERS frame as part of a response sent to

    nvd.nist.gov
  • OpenSSF OSV / OSV ScannerPackage advisoryGO-2026-6617

    HTTP/2 server crash due to HPACK encoder race in net/http

    osv.dev

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.