CVE-2023-50782Public exploitNetwork attack vector

TLS plaintext disclosure via RSA timing oracle

Published Feb 5, 2024 · Updated Mar 24, 2026

Observable timing discrepancy in cryptography before 42.0.0 allows remote attackers to decrypt captured messages from RSA TLS sessions. RSA PKCS#1 v1.5 decryption exposes padding failures through distinguishable Python exception paths instead of backend implicit rejection. Reachability requires an application that exposes RSA PKCS#1 v1.5 decryption, and confidentiality is the only reported impact.

CVSS severity7.5
High
EPSS probability1.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Observable timing discrepancy in cryptography before 42.0.0 allows remote attackers to decrypt captured messages from RSA TLS sessions. RSA PKCS#1 v1.5 decryption exposes padding failures through distinguishable Python exception paths instead of backend implicit rejection. Reachability requires an application that exposes RSA PKCS#1 v1.5 decryption, and confidentiality is the only reported impact.

The record

CVE
CVE-2023-50782
Published
Feb 5, 2024
Updated
Mar 24, 2026
Vendor
Red Hat
Product
Red Hat Enterprise Linux 8
Classifications
CWE-203, T1040
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Red Hat · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.
Red Hat · Red Hat Update InfrastructureAffected versions are unavailable in this record.
Python Cryptographic Authority · cryptographyversion=3.2 <42.0.0

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
8.7GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
7.5Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-203Observable Discrepancy
T1040Network Sniffing

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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