TI-2026-62214 Aliases CVE-2026-92103

Mint HTTP/2 client buffers oversized frames up to 16 MiB before enforcing max_frame_size

MEDIUM 61CWE-770Published 2026-09-28 · Updated 2026-09-30

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: Present
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · Low
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

Allocation of Resources Without Limits or Throttling vulnerability in elixir-mint mint allows a malicious HTTP/2 server to make the client hold up to about 16 MiB per connection in frames it should reject, consuming client memory. Mint.HTTP2.Frame.decode_next/2 in lib/mint/http2/frame.ex compares a frame with the client's max_frame_size (16,384 bytes by default) only once the whole declared payload has arrived. Until then it returns :more, and Mint.HTTP2 keeps every received byte in the connection buffer. A server can declare a frame length of up to 16,777,215 bytes and withhold the last byte, keeping roughly 1,024 times the advertised limit buffered for as long as the connection stays open. The server has to send every byte the client buffers, so there is no amplification, and the buffer stops at the 24-bit frame length limit. This issue affects mint: from 0.1.0 before 1.10.2.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00328 26th percentileScored 2026-11-07

Fix Fixed mint (elixir-mint): 1.10.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
elixir-mint	mint	0.1.0 to before 1.10.2	1.10.2	Patch available	CNA

mint Vendorelixir-mint Affected 0.1.0 to before 1.10.2 Fixed in 1.10.2 Patch available CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:elixir-mint:mint::::::::	—	—	—

cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

Fix · CNA mint (elixir-mint) Fixed in 1.10.2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-09-28
elixir-mint mint 1.10.2
3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-63369 Mint HTTP/1 client applies chunked framing when chunked is not the final transfer coding…Priority MEDIUM 61
- TI-2026-61862 HPACK-indexed cookie fields in Mint HTTP/2 responses bypass max_header_list_size and exhaust client memoryPriority LOW 36
Show all 3 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-92103

References

Patch 2

Advisory 1

GitHub Advisory

Other 3

TI-2026-41929 Unauthenticated denial-of-service via unbounded HPACK integer decoding in hpax CVSS 4.0HIGH 8.7
TI-2026-40963 mint buffers an entire chunked response chunk in memory in Mint.HTTP1.decode_body/5 CVSS 4.0HIGH 8.7
TI-2026-36665 HTTP/2 CONTINUATION flood in Mint client via unbounded header-block accumulation CVSS 4.0HIGH 8.2
TI-2026-36126 Unbounded conn.streams growth in Mint HTTP/2 client via unenforced PUSH_PROMISE concurrency CVSS 4.0HIGH 8.2
TI-2026-57046 Unbounded HTTP/1 status-line and chunk-extension buffering in Mint causes memory-exhaustion DoS CVSS 4.0HIGH 8.2
TI-2026-41932 Unbounded HTTP/1 response-header and chunked-trailer accumulation in Mint causes memory-exhaustion DoS CVSS 4.0HIGH 8.2

See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences