CVE-2026-48862: CWE-770 Allocation of Resources Without Limits or Throttling in elixir-mint mint
CVE-2026-48862 is a high-severity vulnerability in the elixir-mint Mint HTTP/2 client library affecting versions from 0. 2. 0 before 1. 9. 0. It allows attacker-controlled HTTP/2 servers to exhaust client memory by flooding with PUSH_PROMISE frames. The client accepts server push by default and does not enforce concurrency limits at the time of receiving PUSH_PROMISE frames, leading to unbounded resource allocation until memory exhaustion occurs.
AI Analysis
Technical Summary
This vulnerability arises because Mint's HTTP/2 implementation inserts a reserved stream entry for every PUSH_PROMISE frame without consulting the max_concurrent_streams client setting at promise time. The concurrency limit is only checked later when the response HEADERS arrive. A malicious HTTP/2 server can send many PUSH_PROMISE frames and withhold the corresponding HEADERS, causing the client to accumulate reserved streams indefinitely and exhaust memory. This affects Mint versions from 0.2.0 up to but not including 1.9.0.
Potential Impact
An attacker controlling an HTTP/2 server can cause a Mint client to consume excessive memory by sending a large number of PUSH_PROMISE frames without completing the promised streams. This can lead to denial of service due to memory exhaustion in the client process. No known exploits in the wild have been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch or official fix is available, consider disabling HTTP/2 server push (client_settings.enable_push) in Mint clients to prevent PUSH_PROMISE frames from being accepted, thereby mitigating the risk of memory exhaustion.
CVE-2026-48862: CWE-770 Allocation of Resources Without Limits or Throttling in elixir-mint mint
Description
CVE-2026-48862 is a high-severity vulnerability in the elixir-mint Mint HTTP/2 client library affecting versions from 0. 2. 0 before 1. 9. 0. It allows attacker-controlled HTTP/2 servers to exhaust client memory by flooding with PUSH_PROMISE frames. The client accepts server push by default and does not enforce concurrency limits at the time of receiving PUSH_PROMISE frames, leading to unbounded resource allocation until memory exhaustion occurs.
CVSS v4.0
Score 8.2high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability arises because Mint's HTTP/2 implementation inserts a reserved stream entry for every PUSH_PROMISE frame without consulting the max_concurrent_streams client setting at promise time. The concurrency limit is only checked later when the response HEADERS arrive. A malicious HTTP/2 server can send many PUSH_PROMISE frames and withhold the corresponding HEADERS, causing the client to accumulate reserved streams indefinitely and exhaust memory. This affects Mint versions from 0.2.0 up to but not including 1.9.0.
Potential Impact
An attacker controlling an HTTP/2 server can cause a Mint client to consume excessive memory by sending a large number of PUSH_PROMISE frames without completing the promised streams. This can lead to denial of service due to memory exhaustion in the client process. No known exploits in the wild have been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch or official fix is available, consider disabling HTTP/2 server push (client_settings.enable_push) in Mint clients to prevent PUSH_PROMISE frames from being accepted, thereby mitigating the risk of memory exhaustion.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- EEF
- Date Reserved
- 2026-05-25T20:44:10.697Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1efb6ee29bf47b50db3cc4
Added to database: 6/2/2026, 3:49:02 PM
Last enriched: 6/2/2026, 4:03:30 PM
Last updated: 6/2/2026, 6:13:06 PM
Views: 7
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