libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a heap-based buffer over-read in the xmlDictComputeFastKey function in dict.c. This vulnerability causes programs that use libxml2, such as PHP, to crash. This vulnerability exists because of an incomplete fix for libxml2 Bug 759398.
CVE-2017-9049
HIGHNVD 7.57.5—Elevated
EchelonGraph scoreMEDIUM confidence
Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 7.5; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 4.6%CVSS: 7.5Exploit: Elevated riskExposed services: —
A fix is available — apply it.
Internet exposure
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- CVSS v3
- 7.5
- EG Score
- 7.5HIGHmedium confidence
- EG Risk
- 65EG Risk 65/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity75% × 45%Exploitation40% × 40%Automatability100% × 15%CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 4.6%
- EPSS %ILE
- 91st
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
May 18, 2017
Last Modified
June 17, 2026
References (12)
- cve@mitrehttp://www.debian.org/security/2017/dsa-3952
- cve@mitrehttp://www.openwall.com/lists/oss-security/2017/05/15/1
- cve@mitrehttp://www.securityfocus.com/bid/98601
- cve@mitrehttps://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
- cve@mitrehttps://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
- cve@mitrehttps://security.gentoo.org/glsa/201711-01
- af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2017/dsa-3952
- af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2017/05/15/1
- af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/98601
- af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
- af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
- af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/201711-01
Vendor Advisories for CVE-2017-9049
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Related CVEs(same product + same vendor + same CWE)· as of October 5, 2026
Same product
10 shownDebian:9:libxml2
Same vendor
10 shownredhat:RHSA-2018:2486 · ubuntu:USN-3424-1
- CVE-2017-9050EG 7.5EPSS p91HIGH
- CVE-2017-9048EG 7.5EPSS p92HIGH
- CVE-2017-9047EG 7.5HIGH
- CVE-2017-7376EG 9.8EPSS p98CRITICAL
- CVE-2017-7375EG 9.8CRITICAL
- CVE-2017-0663EG 7.8HIGH
- CVE-2016-8619NVD 5.3EG 9.8EPSS p92CRITICAL
- CVE-2016-8622NVD 3.7EG 9.8EPSS p91CRITICAL
- CVE-2016-8618NVD 5.3EG 9.8EPSS p92CRITICAL
- CVE-2018-0500EG 9.8EPSS p93CRITICAL
Frequently asked(5)
What is CVE-2017-9049?
CVE-2017-9049 is a high vulnerability published on May 18, 2017. libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a heap-based buffer over-read in the xmlDictComputeFastKey function in dict.c. This vulnerability causes programs that use libxml2, such as PHP, to crash. This vulnerability exists because of an incomplete fix for libxml2 Bug 759398.
When was CVE-2017-9049 disclosed?
CVE-2017-9049 was first published on May 18, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-9049 actively exploited?
CVE-2017-9049 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.6% probability of exploitation in the next 30 days (91st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2017-9049?
CVE-2017-9049 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2017-9049?
A fix for CVE-2017-9049 is available: update to the fixed version the vendor names in its advisory.
Dependency Blast Radius
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