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No exploitation reportedFix available

CVE-2020-35902

No exploitation reported by the sources we read.

  • Published2020-12-31
  • Fixed in0.3.0-beta.1 · 0.3.0
  • WeaknessCWE-416

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An issue was discovered in the actix-codec crate before 0.3.0-beta.1 for Rust. There is a use-after-free in Framed.

Timeline

dates in UTC
  1. 2020-12-3109:15CVE publishedNVD

Versions per branch

OSV · NVD
actix-codec
BranchAffectedFixed in
0.x≥ 0.0.0-0, < 0.3.0-beta.10.3.0-beta.1
0.3< 0.3.00.3.0
Actix actix-codec
BranchAffectedFixed in
0.2≤ 0.2.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update actix-codec to 0.3.0-beta.1 · 0.3.0

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.19.8read 2026-10-23
  • NVDCVSS 2.07.5read 2026-10-23
  • NVDweakness (CWE)CWE-416read 2026-10-23
  • FIRST EPSSEPSS score1.6 %2026-11-09
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryCRITICAL2021-08-19

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2020-12-31
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-rqgx-hpg4-456r

Frequently asked questions

What is CVE-2020-35902?

An issue was discovered in the actix-codec crate before 0.3.0-beta.1 for Rust. There is a use-after-free in Framed.

Is CVE-2020-35902 actively exploited?

Active exploitation of CVE-2020-35902 has not been confirmed. Its EPSS score was 1.6% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-35902?

CVE-2020-35902 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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