CVE-2026-56810Public exploitNetwork attack vector

Application crash via unbounded chunk buffering

Published Jul 6, 2026 · Updated Jul 6, 2026

Denial of service in Elixir Mint 0.5.0 through 1.9.0 allows remote attackers to crash applications via oversized chunked responses. Mint.HTTP1.decode_body/5 appends partial chunk data to an unbounded data_buffer and withholds it until the server-declared chunk length arrives. The attacker must control or compromise a server reached by the client; an unfinished oversized chunk exhausts application memory.

CVSS severity8.7
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Elixir Mint 0.5.0 through 1.9.0 allows remote attackers to crash applications via oversized chunked responses. Mint.HTTP1.decode_body/5 appends partial chunk data to an unbounded data_buffer and withholds it until the server-declared chunk length arrives. The attacker must control or compromise a server reached by the client; an unfinished oversized chunk exhausts application memory.

The record

CVE
CVE-2026-56810
Published
Jul 6, 2026
Updated
Jul 6, 2026
Vendor
Elixir Mint
Product
Mint
Classifications
CWE-770, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.5.0 <1.9.1
  2. Affected versionversion=c575d819d39ebf7e9b77ec24584a5ffbb11c844e <193ce714907d16e8adc4ab3c40e4f0c2f045b2a6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Elixir Mint · Mintversion=0.5.0 <1.9.1; version=c575d819d39ebf7e9b77ec24584a5ffbb11c844e <193ce714907d16e8adc4ab3c40e4f0c2f045b2a6

Published CVSS scores

8.7Elixir MintCVSS: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 describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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