CVE-2022-23734Network attack vector

Remote code execution via Memcached data deserialization

Published Oct 19, 2022 · Updated May 9, 2025

Unsafe deserialization in GitHub Enterprise Server allows remote attackers to execute code on the Subversion bridge through crafted cache data. An SSRF path can inject arbitrary attacker-controlled data into Memcached, which the SVN bridge deserializes without establishing its trustworthiness. Exploitation requires an SSRF primitive that reaches the cache, and successful execution runs in the server-side SVN bridge context.

CVSS severity8.8
High
EPSS probability2.04%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in GitHub Enterprise Server allows remote attackers to execute code on the Subversion bridge through crafted cache data. An SSRF path can inject arbitrary attacker-controlled data into Memcached, which the SVN bridge deserializes without establishing its trustworthiness. Exploitation requires an SSRF primitive that reaches the cache, and successful execution runs in the server-side SVN bridge context.

The record

CVE
CVE-2022-23734
Published
Oct 19, 2022
Updated
May 9, 2025
Vendor
Twitter
Product
GitHub Enterprise Server
Classifications
CWE-502, T1190
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 19, 2022CVE publishedPublication date reported by the CVE source.
  2. May 9, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.2 <3.2.16
  2. Affected versionversion=3.3 <3.3.11
  3. Affected versionversion=3.4 <3.4.6
  4. Affected versionversion=3.5 <3.5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Twitter · GitHub Enterprise Serverversion=3.2 <3.2.16; version=3.3 <3.3.11; version=3.4 <3.4.6; version=3.5 <3.5.3

Published CVSS scores

8.8CISA ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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