CVE-2026-58226

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-58226
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-58226.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-58226
Aliases
Published
2026-07-06T09:03:47Z
Modified
2026-08-12T03:30:28Z
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

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 
{
    "cna_assigner":  "EEF",
    "cwe_ids":  [
        "CWE-407"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58226.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "introduced":  "56db437a7e2c515e3bdd770ac7947b02cd2390d0"
                },
                {
                    "fixed":  "1ba4bb2dc91e80089cf89c73970ac3ded76f17eb"
                }
            ],
            "source":  "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/elixir-mint/hpax

Affected ranges

Type
GIT
Repo
https://github.com/elixir-mint/hpax
Events
Introduced
9df2bf5d76e210d7da2402bce29498c5bf620ebf
Fixed
8d9c57ab94651b3f076871eebe3b70fa208fe3e3
Fixed
1ba4bb2dc91e80089cf89c73970ac3ded76f17eb
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0.1.1"
        },
        {
            "fixed":  "1.0.4"
        }
    ],
    "source":  [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

v0.*
v0.1.1
v0.1.2
v0.2.0
v1.*
v1.0.0
v1.0.1
v1.0.2
v1.0.3

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-58226.json"