Server crash via unbounded PPR resume processing
Published Jan 26, 2026 · Updated Jan 26, 2026
Denial of service in affected Vercel Next.js 15 canary releases and 16.1.0 through 16.1.4 allows remote attackers to crash servers. The PPR resume endpoint buffers an unbounded POST body with Buffer.concat or expands attacker-controlled cache data with inflateSync without an output limit. Exposure requires a self-hosted application with experimental.ppr or cacheComponents enabled and NEXT_PRIVATE_MINIMAL_MODE set to 1; exhaustion terminates the Node.js process.
Summary
What happened
Denial of service in affected Vercel Next.js 15 canary releases and 16.1.0 through 16.1.4 allows remote attackers to crash servers. The PPR resume endpoint buffers an unbounded POST body with Buffer.concat or expands attacker-controlled cache data with inflateSync without an output limit. Exposure requires a self-hosted application with experimental.ppr or cacheComponents enabled and NEXT_PRIVATE_MINIMAL_MODE set to 1; exhaustion terminates the Node.js process.
The record
- CVE
- CVE-2025-59472
- Published
- Jan 26, 2026
- Updated
- Jan 26, 2026
- Vendor
- Vercel
- Product
- Next.js
- Classifications
- CWE-770, CWE-400, T1499.003
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 26, 2026CVE publishedPublication date reported by the CVE source.
- Jan 26, 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.
- Affected versionversion=15.0.0-canary.0 <15.0.0
- Affected versionversion=15.0.1-canary.0 <15.0.1
- Affected versionversion=15.0.2-canary.0 <15.0.2
- Affected versionversion=15.0.3-canary.0 <15.0.3
- Affected versionversion=15.0.4-canary.0 <15.0.4
- Affected versionversion=15.0.5-canary.0 <15.0.5
- Affected versionversion=15.0.6-canary.0 <15.0.6
- Affected versionversion=15.0.7-canary.0 <15.0.7
- Affected versionversion=15.1.0-canary.0 <15.1.0
- Affected versionversion=15.1.10-canary.0 <15.1.10
- Affected versionversion=15.1.11-canary.0 <15.1.11
- Affected versionversion=15.1.1-canary.0 <15.1.1
- Affected versionversion=15.1.2-canary.0 <15.1.2
- Affected versionversion=15.1.3-canary.0 <15.1.3
- Affected versionversion=15.1.4-canary.0 <15.1.4
- Affected versionversion=15.1.5-canary.0 <15.1.5
- Affected versionversion=15.1.6-canary.0 <15.1.6
- Affected versionversion=15.1.7-canary.0 <15.1.7
- Affected versionversion=15.1.8-canary.0 <15.1.8
- Affected versionversion=15.1.9-canary.0 <15.1.9
- Affected versionversion=15.2.0-canary.0 <15.2.0
- Affected versionversion=15.2.1-canary.0 <15.2.1
- Affected versionversion=15.2.2-canary.0 <15.2.2
- Affected versionversion=15.2.3-canary.0 <15.2.3
- Affected versionversion=15.2.4-canary.0 <15.2.4
- Affected versionversion=15.2.5-canary.0 <15.2.5
- Affected versionversion=15.2.6-canary.0 <15.2.6
- Affected versionversion=15.2.7-canary.0 <15.2.7
- Affected versionversion=15.2.8-canary.0 <15.2.8
- Affected versionversion=15.3.0-canary.0 <15.3.0
- Affected versionversion=15.3.1-canary.0 <15.3.1
- Affected versionversion=15.3.2-canary.0 <15.3.2
- Affected versionversion=15.3.3-canary.0 <15.3.3
- Affected versionversion=15.3.4-canary.0 <15.3.4
- Affected versionversion=15.3.5-canary.0 <15.3.5
- Affected versionversion=15.3.6-canary.0 <15.3.6
- Affected versionversion=15.3.7-canary.0 <15.3.7
- Affected versionversion=15.3.8-canary.0 <15.3.8
- Affected versionversion=15.4.0-canary.0 <15.4.0
- Affected versionversion=15.4.10-canary.0 <15.4.10
- Affected versionversion=15.4.1-canary.0 <15.4.1
- Affected versionversion=15.4.2-canary.0 <15.4.2
- Affected versionversion=15.4.3-canary.0 <15.4.3
- Affected versionversion=15.4.4-canary.0 <15.4.4
- Affected versionversion=15.4.5-canary.0 <15.4.5
- Affected versionversion=15.4.6-canary.0 <15.4.6
- Affected versionversion=15.4.7-canary.0 <15.4.7
- Affected versionversion=15.4.8-canary.0 <15.4.8
- Affected versionversion=15.4.9-canary.0 <15.4.9
- Affected versionversion=15.5.0-canary.0 <15.5.0
- Affected versionversion=15.5.1-canary.0 <15.5.1
- Affected versionversion=15.5.2-canary.0 <15.5.2
- Affected versionversion=15.5.3-canary.0 <15.5.3
- Affected versionversion=15.5.4-canary.0 <15.5.4
- Affected versionversion=15.5.5-canary.0 <15.5.5
- Affected versionversion=15.5.6-canary.0 <15.5.6
- Affected versionversion=15.5.7-canary.0 <15.5.7
- Affected versionversion=15.5.8-canary.0 <15.5.8
- Affected versionversion=15.5.9-canary.0 <15.5.9
- Affected versionversion=16.1.0 <16.1.5
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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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