EEF-CVE-2026-58226
- Source
- https://cna.erlef.org/osv/EEF-CVE-2026-58226.html
- Import Source
- https://cna.erlef.org/osv/EEF-CVE-2026-58226.json
- JSON Data
- https://api.osv.dev/v1/vulns/EEF-CVE-2026-58226
- Aliases
-
- CVE-2026-58226
- GHSA-jj2p-32j7-whj2
- Published
- 2026-07-06T09:03:47.374Z
- Modified
- 2026-07-06T14:04:14.632Z
- Severity
-
- 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- Unauthenticated denial-of-service via unbounded HPACK integer decoding in hpax
- Details
-
Summary
Inefficient Algorithmic Complexity vulnerability in elixir-mint hpax allows unauthenticated denial-of-service via unbounded HPACK integer decoding.
hpax decodes HPACK variable-length integers with no upper bound on the decoded value or the number of continuation octets. 'Elixir.HPAX.Types':decode_remaining_integer/3 accumulates the integer as int + (value <<< m), shifting by 7 more bits for each continuation octet and stopping only on a terminating octet or truncated input, never because the integer grew too large. Because BEAM integers are arbitrary precision, a run of N continuation octets builds an O(N)-bit bignum and re-adds into an ever-larger bignum on each step, so the total decoding cost is superlinear (about O(N^2)). An unauthenticated attacker who can send an HTTP/2 header block to a server using this decoder (reached through the 'Elixir.HPAX':decode/2 entry point) can supply a small header block that forces a large, attacker-controlled amount of CPU (and transient memory), a denial-of-service amplification.
This issue affects hpax from 0.1.1 before 1.0.4.
- Database specific
{ "cpe_ids": [ "cpe:2.3:a:elixir-mint:hpax:*:*:*:*:*:*:*:*" ], "capec_ids": [ "CAPEC-130" ], "cwe_ids": [ "CWE-407" ] }- References
- Credits
-
-
- Peter Ullrich - FINDER
-
- Andrea Leopardi - REMEDIATION_DEVELOPER
-
- Jonatan Männchen / EEF - ANALYST
-
- Eric Meadows-Jönsson - ANALYST
-
Affected packages
Hex / hpax
Package
- Name
- hpax
- Purl
- pkg:hex/hpax