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Low

Undici's fetch with integrity option is too lax when algorithm is specified but hash value is in incorrect

  • Disclosed: 04.04.2024
  • Updated: 11.10.2026 10:22

Impact

If an attacker can alter the integrity option passed to fetch(), they can let fetch() accept requests as valid even if they have been tampered.

Patches

Fixed in https://github.com/nodejs/undici/commit/d542b8cd39ec1ba303f038ea26098c3f355974f3. Fixes has been released in v5.28.4 and v6.11.1.

Workarounds

Ensure that integrity cannot be tampered with.

References

https://hackerone.com/reports/2377760

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
npm package undici < 5.28.4, >= 6.0.0, < 6.11.1 5.28.4, 6.11.1

References

CVSS score 2.6/10
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N
Weakness (CWE)
CWE-284
Platform
npm
Package
undici
Disclosed
04.04.2024
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-9qxr-qj54-h672 - CC BY 4.0

Vulnerability history: undici

All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (46) in the archive
Total entries
46
First → latest
06.2022 09.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • High 13
  • Medium 21
  • Low 12

Disclosures per year

Severity:
  1. undici vulnerable to Denial of Service via unrequested WebSocket subprotocol
    High · 7.5 CVE-2026-19534 >= 6.7.0, < 6.28.1, >= 7.0.0, < 7.29.1, >= 8.0.0, < 8.10.2 6.28.1, 7.29.1, 8.10.2
  2. undici vulnerable to TLS certificate validation bypass via dropped connect options in BalancedPool
    High · 7.4 CVE-2026-84961 >= 7.24.1, < 7.29.1, >= 8.0.0, < 8.10.2 7.29.1, 8.10.2
  3. undici vulnerable to cross-origin cache poisoning via missing origin isolation in interceptors
    High · 7.4 CVE-2026-85152 >= 8.10.0, < 8.10.2 8.10.2
  4. undici vulnerable to cross-user information disclosure and parse-time crash via degenerate private cache directives
    High · 7.4 CVE-2026-13697 >= 7.0.0, < 7.29.0, >= 8.0.0, < 8.9.0 7.29.0, 8.9.0
  5. undici WebSocket client vulnerable to denial of service via fragment count bypass
    High · 7.5 CVE-2026-12151 < 6.27.0, >= 7.0.0, < 7.28.0, >= 8.0.0, < 8.5.0 6.27.0, 7.28.0, 8.5.0
  6. undici vulnerable to cross-origin request routing via SOCKS5 proxy pool reuse
    High · 7.5 CVE-2026-6734 >= 7.23.0, < 7.28.0, >= 8.0.0, < 8.2.0 7.28.0, 8.2.0
  7. undici vulnerable to TLS certificate validation bypass via dropped requestTls in SOCKS5 ProxyAgent
    High · 7.4 CVE-2026-9697 >= 7.23.0, < 7.28.0, >= 8.0.0, < 8.5.0 7.28.0, 8.5.0
  8. undici WebSocket client vulnerable to denial of service via cumulative fragment bypass
    High · 7.5 CVE-2026-9675 >= 8.0.0, < 8.5.0 8.5.0
  9. Undici has Unbounded Memory Consumption in WebSocket permessage-deflate Decompression
    High · 7.5 CVE-2026-1526 < 6.24.0, >= 7.0.0, < 7.24.0 6.24.0, 7.24.0
  10. Undici has Unhandled Exception in WebSocket Client Due to Invalid server_max_window_bits Validation
    High · 7.5 CVE-2026-2229 < 6.24.0, >= 7.0.0, < 7.24.0 6.24.0, 7.24.0
  11. Undici: Malicious WebSocket 64-bit length overflows parser and crashes the client
    High · 7.5 CVE-2026-1528 >= 6.0.0, < 6.24.0, >= 7.0.0, < 7.24.0 6.24.0, 7.24.0
  12. Undici's fetch with integrity option is too lax when algorithm is specified but hash value is in incorrect this entry
    Low · 2.6 CVE-2024-30261 < 5.28.4, >= 6.0.0, < 6.11.1 5.28.4, 6.11.1
  13. Regular Expression Denial of Service in Headers
    High · 7.5 CVE-2023-24807 < 5.19.1 5.19.1
  14. ProxyAgent vulnerable to MITM
    High · 7.7 CVE-2022-32210 >= 4.8.2, < 5.5.1 5.5.1

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