| Name | CVE-2026-92091 |
| Description | A flaw was found in jwcrypto. The JWK.import_key() function validates the key_ops JWK member for duplicate values using an algorithm with O(n^2) time complexity, and the length of key_ops is not bounded. A remote, unauthenticated attacker can supply a JWK with a large key_ops array to an application that passes attacker-controlled key material to a public key-import API (reachable via ECDH-ES key agreement, OIDC dynamic client registration, DPoP, or ACME account key registration, among others) to consume excessive CPU time, resulting in a denial of service. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1148270 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| python-jwcrypto (PTS) | bookworm | 1.1.0-1+deb12u1 | vulnerable |
| trixie | 1.5.6-1.1~deb13u1 | vulnerable | |
| forky, sid | 1.5.6-1.2 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| python-jwcrypto | source | (unstable) | (unfixed) | 1148270 |
[bookworm] - python-jwcrypto <postponed> (Minor issue, DoS)
https://github.com/latchset/jwcrypto/security/advisories/GHSA-pwgw-f7xr-863h
https://github.com/latchset/jwcrypto/pull/398
https://github.com/latchset/jwcrypto/commit/21d2a2c20dbc1201ebe0b9b2621417629f37bfcd (v1.6.1)