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VulnerabilityPublished

CVE-2026-48861: mint · CRLF Injection

Affects mintSource CVE Database V5

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Not known to be exploited · CVSS 2.1 Low : upgrade to 1.9.0 when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 4.0 base score
2.1Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.9.0, fad091454cbb7449b19edb8e1fee12ca7cf28c3a
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade mint to 1.9.0; mint to fad091454cbb7449b19edb8e1fee12ca7cf28c3a.

Affected software

ProductAffectedFixed in
elixir-mintmintAffected
  • >=0.1.0 <1.9.0
Fixed in
  • 1.9.0
elixir-mintmintAffected
  • ≥ 8db1acff30b6a9433762c18b1e1f891b8c1f74f7, < fad091454cbb7449b19edb8e1fee12ca7cf28c3a
Fixed in
  • fad091454cbb7449b19edb8e1fee12ca7cf28c3a
Hexmintpkg:hex/mintOther threatsAffected
  • =0.1.0
Fixed in–
Hexmintpkg:hex/mintOther threatsAffected
  • >=0.1.0 <1.9.0
Fixed in
  • 1.9.0

CPE configurations (1)

  • cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:*

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Mint 1.7.0 introduced validation for the request target but did not validate the method field, which remains exploitable by default. Users should avoid passing untrusted input as the HTTP method to Mint.HTTP.request/5.

Description

CVE-2026-48861 is a low-severity vulnerability in the elixir-mint Mint library that allows CRLF injection via HTTP request line manipulation. The vulnerability arises because the encode_request_line/2 function inserts user-supplied HTTP method and target directly into the request line without validating the method field. While Mint 1.7.0 added validation to the target field to reject CRLF and control characters, the method field remains unvalidated, allowing attackers to inject CRLF sequences through the method. This can lead to HTTP request splitting and request smuggling attacks. The issue affects all versions from 0.1.0 up to but not including 1.9.0.

References

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