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NVD description
A flaw in Node.js HTTP Agent can cause a client to accept as valid a response that is send before the client has sent the request. This vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.
Priority
LOW
Exploitation
NONE
PoC
YES
Patch
AVAILABLE
Momentum
STABLE
If you run products in this scope, you should treat this CVE as relevant to your environment.
3 versions affected across 1 product
| Date | Total | Labels |
|---|
| 2026-06-19 | 1 | Patch1 |
| 2026-07-02 | 2 | Disclosure1General1 |
| 2026-07-03 | 1 | False Positive1 |
| 2026-07-04 | 2 | False Positive2 |
| 2026-07-05 | 1 | False Positive1 |
| 2026-07-09 | 1 | False Positive1 |
| 2026-07-10 | 1 | False Positive1 |
@nodejs Full write-up, including the apology: https://adventures.nodeland.dev/archive/cve-2026-48931-shouldnt-have-been-a-cve/
Post summary
The tweet merely points to a write-up about CVE-2026-48931 without any additional technical or operational details.
@nodejs CVE-2026-48931: HTTP/1.1 response queue poisoning in http.Agent. A malicious server stages an extra response on an idle keep-alive socket. Your next request picks up that socket and reads those bytes as its response. Every response after that is shifted by one.
Post summary
The post discloses CVE-2026-48931, describing how an attacker can poison the response queue in Node.js’s http.Agent, shifting responses, but provides no evidence of exploitation, PoC, patch or mitigation.
めっちゃ面白かった。 CVE-2026-48931 は脆弱性として修正するべきではなかったというポスト。 / https://htn.to/4da2anJGP7
Post summary
The post asserts that CVE‑2026‑48931 was mistakenly identified as a vulnerability, implying the CVE is a false positive.
The distinction between routine hardening and a CVE matters — mis-classified advisories create unnecessary panic and can break more downstream users than the original vulnerability ever would. https://adventures.nodeland.dev/archive/cve-2026-48931-shouldnt-have-been-a-cve
Post summary
The post argues that CVE‑2026‑48931 was misclassified as a CVE, presenting a false positive or unnecessary designation.
Node.js CVE-2026-48931 "HTTP Response Queue Poisoning via TOCTOU Race Condition in http.Agent" is now believed not to be a vulnerability, but rather room for hardening, which was implemented and unfortunately introduced observable side effect https://www.openwall.com/lists/oss-security/2026/07/02/2
Post summary
The discussion clarifies that Node.js CVE-2026-48931 is not a genuine vulnerability, though hardening was applied and caused a side effect. This is a debunking statement rather than a report of exploitation or patch release.
@matteocollina Sharing a real-world impact from the 2026-06-18 Node security release. The http.Agent response-queue fix + TLS session-reuse changes (CVE-2026-48931 et al.) are correct, but they surface a hard break in node-fetch@2: "FetchError: ... Premature close" on keep-alive reuse
Post summary
The message reports that Node’s 2026‑06‑18 security release fixed CVE‑2026‑48931’s TLS session‑reuse issue, noting that the fix introduces a breaking change in node-fetch@2, causing premature connection closures.
Good read: a Node maintainer's candid postmortem on a recent HTTP/1.1 CVE, arguing it shouldn't have been a CVE at all — especially after the fix broke node-fetch, Firebase, and official Docker images. Worth it just for the honesty. https://adventures.nodeland.dev/archive/cve-2026-48931-shouldnt-have-been-a-cve/
Post summary
The post argues that CVE‑2026‑48931 over‑classified and disputes its severity, providing no PoC, exploit, or technical details.
📑 CVE-2026-48931 Shouldn't Have Been a CVE 🅱 はてなブックマーク テクノロジー新着 より https://adventures.nodeland.dev/archive/cve-2026-48931-shouldnt-have-been-a-cve/
Post summary
The post only links to an article suggesting a debunking of CVE‑2026‑48931, with no technical details, exploitation evidence, or patch information provided.
2件のコメント https://b.hatena.ne.jp/entry/s/adventures.nodeland.dev/archive/cve-2026-48931-shouldnt-have-been-a-cve/#utm_campaign=bs_tw “CVE-2026-48931 Shouldn't Have Been a CVE” (3 users) https://htn.to/2C369ot3YY
Post summary
The article argues that CVE‑2026‑48931 was wrongly assigned and probably should not have been designated as a vulnerability.
3 of 3 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | nodejs | node.js | 22.22.3 | - | - |
| App | nodejs | node.js | 24.16.0 | - | - |
| App | nodejs | node.js | 26.3.0 | - | - |