CVE-2019-18848 json
JSON-jwt Gem lacked element count during splitting of JWE string
published 2019-11-12 6 y ago modified 2026-06-17 4 mo ago also GHSA-cff7-6h4q-q5pj , EUVD-2019-0742
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 69%
- public exploits
- 0
- none known
Summary
The json-jwt gem before 1.11.0 for Ruby lacks an element count during the splitting of a JWE string.
Patch / fix
- rubygems json-jwt 1.11.0
- json-jwt_project json-jwt 1.11.0
- ruby-json-jwt Debian 14, Debian 13, Debian 12 1.11.0-1
debian advisories DEBIAN-CVE-2019-18848
- rubygem-json-jwt Package Hub 15 SP5, openSUSE Leap 15.5 1.16.6-bp155.3.3.1
- rubygem-aes_key_wrap Package Hub 15 SP5, openSUSE Leap 15.5 1.1.0-bp155.2.1
opensuse advisories openSUSE-SU-2025:0004-1
Exploit prediction
1.26% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| rubygems | json-jwt | <1.11.0 |
1.11.0 |
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
github.com
/nov/json-jwt/commit/ada16e772906efdd035e3df49cb2ae372f0f948a
web, patch
-
github.com
/nov/json-jwt/compare/v1.10.2...v1.11.0
web, patch
-
lists.debian.org
/debian-lts-announce/2020/10/msg00001.html
mailing-list, web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2019-18848
advisory
-
github.com
/nov/json-jwt
package
-
github.com
/rubysec/ruby-advisory-db/blob/master/gems/json-jwt/CVE-2019-18848.yml
web
Sources
- CVE List CVE-2019-18848
- GitHub Advisory GHSA-cff7-6h4q-q5pj
- NVD CVE-2019-18848
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