CVE Intelligence
Medium Injection exploit reference

CVE-2022-32213 — llhttp allows HTTP Request Smuggling via Flawed Parsing of Transfer-Encoding

The llhttp parser <v14.20.1, <v16.17.1 and <v18.9.1 in the http module in Node.js does not correctly parse and validate Transfer-Encoding headers and can lead to HTTP Request Smuggling (HRS).

Published Jul 14, 2022 · Updated Oct 21, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: hackerone

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 46% (30-day exploitation probability)+15
  • Technical severity (medium)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
45.96%
ahead of 99% of scored CVEs · Oct 23, 2026
Affects
Debian
Debian Linux and 6 more
CVSS base
6.5
Medium · 2 source(s)
Prioritization reference: 9.1 provisional

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

  • Documented patch — cert-portal.siemens.com (NIST National Vulnerability Database)
  • Documented patch — nodejs.org (NIST National Vulnerability Database)
  • Npm Llhttp: fixed in version 6.0.7 — github.com (GitHub Security Advisories)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Debian Debian Linux, Fedoraproject Fedora, Llhttp Llhttp…).
  2. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
  3. Apply the fixed version or the patch documented under Remediation.
  4. EPSS ahead of 99% of scored CVEs: prioritize it in the patch queue.
  5. Search available logs for exploit probes matching the vulnerability class (injection), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Debian Debian Linux version 11.0 Vulnerable NIST National Vulnerability Database
Fedoraproject Fedora version 36version 37version 35 Vulnerable NIST National Vulnerability Database
Llhttp Llhttp ≥ 6.0.0 and < 6.0.7< 2.1.5 Vulnerable NIST National Vulnerability Database
Nodejs Node ≥ 9.0 and < 9.*≥ 7.0 and < 7.*≥ 10.0 and < 10.*≥ 11.0 and < 11.*≥ 12.0 and < 12.*≥ 13.0 and < 13.*≥ 14.0 and < 14.20.1≥ 15.0 and < 15.*
and 7 more ≥ 16.0 and < 16.17.1≥ 17.0 and < 17.*≥ 18.0 and < 18.9.1≥ 8.0 and < 8.*≥ 6.0 and < 6.*≥ 5.0 and < 5.*≥ 4.0 and < 4.*
Vulnerable CVE Program (cve.org) e CISA ADP
Nodejs Node.js ≥ 18.0.0 and < 18.9.1≥ 16.13.0 and < 16.17.1≥ 16.0.0 and ≤ 16.12.0≥ 14.15.0 and < 14.20.1≥ 14.0.0 and ≤ 14.14.0 Vulnerable NIST National Vulnerability Database
Siemens Sinec Ins version 1.0-sp2version 1.0-sp1version 1.0 Vulnerable NIST National Vulnerability Database
StormShield Stormshield Management Center < 3.3.2 Vulnerable NIST National Vulnerability Database
Npm Llhttp < 6.0.7 Vulnerable GitHub Security Advisories

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
9.1 CVSS 3.1 Critical — — GitHub, Inc. via GitHub Security Advisories
6.5 CVSS 3.1 Medium 3.9 2.5 nvd@nist.gov via NIST National Vulnerability Database
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N (score shown at the top: nvd@nist.gov)
Sources disagree significantly and the divergence is under review. Every score is kept with its origin. For prioritization we use 9.1 (GitHub, Inc. via GitHub Security Advisories) as a conservative provisional reference — not a definitive official score.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-444 · HTTP Request Smuggling

Other CVEs with this weakness →

EPSS over time FIRST

Oct 21, 2026 → Oct 23, 2026 · 3 reading(s) · max 45.96%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
  • Look for parameters with command/query metacharacters and unexpected child processes of the service.
web/proxy/WAF logsnetwork IDS/IPSapplication logsendpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

  • 2026
  • Fix documented
    Oct 21, 2026 · GitHub Security Advisories
  • Affected products added · npm/llhttp
    Oct 21, 2026 · GitHub Security Advisories
  • Affected products added · nodejs/node
    Oct 21, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 21, 2026
  • Fix documented
    Oct 21, 2026 · NIST National Vulnerability Database
  • Affected products added · llhttp/llhttp, nodejs/node.js, fedoraproject/fedora, siemens/sinec ins, debian/debian linux, stormshield/stormshield man
    Oct 21, 2026 · NIST National Vulnerability Database
  • CVSS changed · 6.5
    Oct 21, 2026 · NIST National Vulnerability Database
  • Source status changed · → Modified
    Oct 21, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 21, 2026 · Alertas do Telegram
  • 2022
  • CVE published
    Jul 14, 2022 · hackerone

Source activity

Repeated readings are counted rather than listed.

  • 2× References added · Oct 21, 2026 – Oct 21, 2026
  • 1× Official description updated · Oct 21, 2026 – Oct 21, 2026

References

14 on the record

Elsewhere on this site

Debian
every CVE for this vendor
Injection
same class
CWE-444
other pages naming this weakness

Related CVEs (same products)

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No CISA SSVC assessment.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2022-32213 is "llhttp allows HTTP Request Smuggling via Flawed Parsing of Transfer-Encoding", rated Medium. It affects Debian Linux (Debian); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 6.5 describes technical severity. EPSS 45.96% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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