CVE-2019-11940 json
In the course of decompressing HPACK inside the HTTP2 protocol, an unexpected sequence of header table resize operations can place the head…
published 6y ago modified 4mo ago also EUVD-2019-3596
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 71%
- public exploits
- 0
- none known
Summary
In the course of decompressing HPACK inside the HTTP2 protocol, an unexpected sequence of header table resize operations can place the header table into a corrupted state, leading to a use-after-free condition and undefined behavior. This issue affects Proxygen from v0.29.0 until v2017.04.03.00.
Patch / fix
Is CVE-2019-11940 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
1.36% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- Facebook Proxygen
Classification
- Weakness
-
- CWE-416 Use After Free
References
-
github.com
/facebook/proxygen/commit/f43b134cc5c19d8532e7fb670a1c02e85f7a8d4f
patch, third-party-advisory
-
facebook.com
/security/advisories/cve-2019-11940
third-party-advisory
Sources
- CVE List CVE-2019-11940
- NVD CVE-2019-11940
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.