chore(deps): update dependency yaml to v2.8.3 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
yaml (source)	2.7.0 → 2.8.3

GitHub Vulnerability Alerts

CVE-2026-33532

Parsing a YAML document with yaml may throw a RangeError due to a stack overflow.

The node resolution/composition phase uses recursive function calls without a depth bound. An attacker who can supply YAML for parsing can trigger a RangeError: Maximum call stack size exceeded with a small payload (~2–10 KB). The RangeError is not a YAMLParseError, so applications that only catch YAML-specific errors will encounter an unexpected exception type. Depending on the host application's exception handling, this can fail requests or terminate the Node.js process.

Flow sequences allow deep nesting with minimal bytes (2 bytes per level: one [ and one ]). On the default Node.js stack, approximately 1,000–5,000 levels of nesting (2–10 KB input) exhaust the call stack. The exact threshold is environment-dependent (Node.js version, stack size, call stack depth at invocation).

Note: the library's Parser (CST phase) uses a stack-based iterative approach and is not affected. Only the compose/resolve phase uses actual call-stack recursion.

All three public parsing APIs are affected: YAML.parse(), YAML.parseDocument(), and YAML.parseAllDocuments().

PoC

const YAML = require('yaml');

// ~10 KB payload: 5000 levels of nested flow sequences
const payload = '['.repeat(5000) + '1' + ']'.repeat(5000);

try {
  YAML.parse(payload);
} catch (e) {
  console.log(e.constructor.name); // RangeError (NOT YAMLParseError)
  console.log(e.message);          // Maximum call stack size exceeded
}

Test environment: Node.js v24.12.0, macOS darwin arm64

Version	Nesting Depth	Input Size	Result
1.0.0	5,000	10,001 B	RangeError
1.10.2	5,000	10,001 B	RangeError
2.0.0	5,000	10,001 B	RangeError
2.8.2	5,000	10,001 B	RangeError
2.8.3	5,000	10,001 B	YAMLParseError

Depth threshold on yaml 2.8.2:

Nesting Depth	Input Size	Result
500	1,001 B	Parses successfully
1,000	2,001 B	RangeError (threshold varies by stack size)
5,000	10,001 B	RangeError

Severity

• CVSS Score: 4.3 / 10 (Medium)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

---

Release Notes

eemeli/yaml (yaml)

v2.8.3

Compare Source

v2.8.2

Compare Source

v2.8.1

Compare Source

• Preserve empty block literals (#​634)

v2.8.0

Compare Source

• Add node cache for faster alias resolution (#​612)
• Re-introduce compatibility with Node.js 14.6 (#​614)
• Add --merge option to CLI tool (#​611)
• Improve error for tag resolution error on null value (#​616)
• Allow empty string as plain scalar representation, for failsafe schema (#​616)
• docs: include cli example (#​617)

v2.7.1

Compare Source

• Do not allow seq with single-line collection value on same line with map key (#​603)
• Improve warning & avoid TypeError on bad YAML 1.1 nodes (#​610)

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🚀 Performance Test Results

Test Configuration:

• VUs: 4
• Duration: 1m0s

Test Metrics:

• Requests/s: 54.32
• Iterations/s: 18.10
• Failed Requests: 0.00% (0 of 3268)

📜 Logs

> performance@1.0.0 run-tests:testenv /home/runner/work/rafiki/rafiki/test/performance
> ./scripts/run-tests.sh -e test "-k" "-q" "--vus" "4" "--duration" "1m"

Cloud Nine GraphQL API is up: http://localhost:3101/graphql
Cloud Nine Wallet Address is up: http://localhost:3100/
Happy Life Bank Address is up: http://localhost:4100/
cloud-nine-wallet-test-backend already set
cloud-nine-wallet-test-auth already set
happy-life-bank-test-backend already set
happy-life-bank-test-auth already set
     data_received..................: 1.2 MB 20 kB/s
     data_sent......................: 2.5 MB 42 kB/s
     http_req_blocked...............: avg=6.3µs    min=2.33µs  med=5.27µs   max=567.79µs p(90)=6.43µs   p(95)=6.93µs  
     http_req_connecting............: avg=225ns    min=0s      med=0s       max=359.61µs p(90)=0s       p(95)=0s      
     http_req_duration..............: avg=73.06ms  min=6.99ms  med=58.07ms  max=334.56ms p(90)=124.98ms p(95)=144.86ms
       { expected_response:true }...: avg=73.06ms  min=6.99ms  med=58.07ms  max=334.56ms p(90)=124.98ms p(95)=144.86ms
     http_req_failed................: 0.00%  ✓ 0         ✗ 3268
     http_req_receiving.............: avg=79.15µs  min=26.22µs med=70.49µs  max=3.14ms   p(90)=95.87µs  p(95)=113.2µs 
     http_req_sending...............: avg=32.31µs  min=7.08µs  med=25.97µs  max=3.27ms   p(90)=34.51µs  p(95)=44.54µs 
     http_req_tls_handshaking.......: avg=0s       min=0s      med=0s       max=0s       p(90)=0s       p(95)=0s      
     http_req_waiting...............: avg=72.95ms  min=6.82ms  med=57.97ms  max=334.4ms  p(90)=124.9ms  p(95)=144.69ms
     http_reqs......................: 3268   54.320596/s
     iteration_duration.............: avg=220.74ms min=140ms   med=209.86ms max=701.74ms p(90)=274.57ms p(95)=300.84ms
     iterations.....................: 1089   18.101325/s
     vus............................: 4      min=4       max=4 
     vus_max........................: 4      min=4       max=4