CVE Explorer
CVE-2026-39373
JWCrypto implements JWK, JWS, and JWE specifications using python-cryptography. Prior to 1.5.7, an unauthenticated attacker can exhaust server memory by sending crafted JWE tokens with ZIP compression. The existing patch for CVE-2024-28102 limits input token size to 250KB but does not validate the decompressed output size. An unauthenticated attacker can cause memory exhaustion on memory-constrained systems. A token under the 250KB input limit can decompress to approximately 100MB. This vulnera
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"jwcrypto","vendor":"latchset","versions":[{"status":"affected","version":"< 1.5.7"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:ca688cfe2d0c32742f150f1397e3b366f11c8930eb110c0b15b8f599734816ad · sha256:2ff2f421552996e5… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:ca688cfe2d0c32742f150f1397e3b366f11c8930eb110c0b15b8f599734816ad · sha256:2ff2f421552996e5… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-409","description":"CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:ca688cfe2d0c32742f150f1397e3b366f11c8930eb110c0b15b8f599734816ad · sha256:2ff2f421552996e5… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"https://github.com/latchset/jwcrypto/security/advisories/GHSA-fjrm-76x2-c4q4","tags":["x_refsource_CONFIRM"],"url":"https://github.com/latchset/jwcrypto/security/advisories/GHSA-fjrm-76x2-c4q4"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:ca688cfe2d0c32742f150f1397e3b366f11c8930eb110c0b15b8f599734816ad · sha256:2ff2f421552996e5… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.