CVE-2026-125400 json
Ettercap through 0.8.4.1 Use-After-Free via PCRE2 Filter Substitution
published 6d ago modified yesterday also EUVD-2026-120563 , GHSA-f3j5-rhhr-85j5
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository Ettercap/ettercap. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 16%
- public exploits
- 0
- none known
Summary
Ettercap through 0.8.4.1 contains a use-after-free vulnerability in func_pcre() in src/ec_filter.c that reads the PCRE2 ovector after freeing match data. Network-adjacent attackers can send packets matching a loaded pcre_regex() substitution filter to corrupt memory and potentially execute code as root.
Patch / fix
- github.com/Ettercap/ettercap@1d8badb commit
- github.com/Ettercap/ettercap#1330 pull request
Is CVE-2026-125400 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 FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- yesterday
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- Ettercap ettercap
Classification
- Weakness
-
- CWE-416 Use After Free
References
-
github.com
/Ettercap/ettercap/commit/1d8badb713579419a29a494bb463a1af59707e98
patch
-
github.com
/Ettercap/ettercap/pull/1330
issue-tracking, patch
-
github.com
/Ettercap/ettercap/security/advisories/GHSA-f3j5-rhhr-85j5
vendor-advisory, advisory
-
github.com
/Ettercap/ettercap/blob/v0.8.4.1/src/ec_filter.c#L593-L625
technical-description
-
vulncheck.com
/advisories/ettercap-through-0.8.4.1-use-after-free-via-pcre2-filter-substitution
third-party-advisory
Sources
- CVE List CVE-2026-125400
- NVD CVE-2026-125400
- Maintainer advisory GHSA-f3j5-rhhr-85j5
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.
The maintainers of Ettercap/ettercap published their own advisory on GitHub. Reviewed sources take precedence over it.