CVE-2022-25901 is a high-severity (CVSS 7.5) CWE-1333 vulnerability in org.webjars.npm:cookiejar. 2 public exploit or proof-of-concept references are indexed, so weaponization risk is real. A fix is available for org.webjars.npm:cookiejar — see the affected versions and patch details below.
cookiejar Regular Expression Denial of Service via Cookie.parse function
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
Exploitation and automatability from CISA’s SSVC triage for CVE-2022-25901.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
cookiejarnpmDescription
Versions of the package cookiejar before 2.1.4 are vulnerable to Regular Expression Denial of Service (ReDoS) via the Cookie.parse function and other aspects of the API, which use an insecure regular expression for parsing cookie values. Applications could be stalled for extended periods of time if untrusted input is passed to cookie values or attempted to parse from request headers.
Proof of concept:
ts\nconst { CookieJar } = require("cookiejar");
const jar = new CookieJar();
const start = performance.now();
const attack = "a" + "t".repeat(50_000);
jar.setCookie(attack);
console.log(`CookieJar.setCookie(): ${performance.now() - start}ms`);
CookieJar.setCookie(): 2963.214399999939ms
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.webjars.npm:cookiejar | all versions | No fix |
| 📦npm | cookiejar | all versions | 2.1.4npm install cookiejar@2.1.4 |
Affected Products
cookiejarcookiejar_projectResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.webjars.npm:cookiejar, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
A fix is available for CVE-2022-25901; check the affected-versions list above or the advisory for the patched release of org.webjars.npm:cookiejar, then make sure no transitive dependency still pins the vulnerable range.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.
Frequently Asked Questions
Is CVE-2022-25901 in your dependencies?
Find it across Maven, npm, including transitive dependencies.