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

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yaml is vulnerable to Stack Overflow via deeply nested YAML collections

CVE-2026-33532 / GHSA-48c2-rrv3-qjmp

More information

Details

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

References

• https://github.com/eemeli/yaml/security/advisories/GHSA-48c2-rrv3-qjmp
• https://github.com/eemeli/yaml/commit/1e84ebbea7ec35011a4c61bbb820a529ee4f359b
• https://github.com/eemeli/yaml/releases/tag/v1.10.3
• https://github.com/eemeli/yaml/releases/tag/v2.8.3
• https://nvd.nist.gov/vuln/detail/CVE-2026-33532
• https://github.com/advisories/GHSA-48c2-rrv3-qjmp

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

---

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: 45.89
• Iterations/s: 15.29
• Failed Requests: 0.00% (0 of 2761)

📜 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..................: 996 kB 17 kB/s
     data_sent......................: 2.1 MB 35 kB/s
     http_req_blocked...............: avg=7.48µs   min=1.9µs    med=5.02µs   max=1.46ms   p(90)=6.52µs   p(95)=7.4µs   
     http_req_connecting............: avg=1.4µs    min=0s       med=0s       max=1.42ms   p(90)=0s       p(95)=0s      
     http_req_duration..............: avg=86.48ms  min=6.66ms   med=70.39ms  max=435.06ms p(90)=147.71ms p(95)=171.46ms
       { expected_response:true }...: avg=86.48ms  min=6.66ms   med=70.39ms  max=435.06ms p(90)=147.71ms p(95)=171.46ms
     http_req_failed................: 0.00%  ✓ 0         ✗ 2761
     http_req_receiving.............: avg=105.86µs min=26.03µs  med=88.87µs  max=3.11ms   p(90)=138.94µs p(95)=195.94µs
     http_req_sending...............: avg=39.13µs  min=9.45µs   med=24.33µs  max=2.82ms   p(90)=40.93µs  p(95)=64.04µs 
     http_req_tls_handshaking.......: avg=0s       min=0s       med=0s       max=0s       p(90)=0s       p(95)=0s      
     http_req_waiting...............: avg=86.34ms  min=6.52ms   med=70.17ms  max=434.93ms p(90)=147.48ms p(95)=171.36ms
     http_reqs......................: 2761   45.889325/s
     iteration_duration.............: avg=261.3ms  min=154.21ms med=247.62ms max=854.46ms p(90)=322.4ms  p(95)=356.33ms
     iterations.....................: 920    15.290902/s
     vus............................: 4      min=4       max=4 
     vus_max........................: 4      min=4       max=4 

[mkurapov]

@dependabot rebase