CVE-2017-9798

HIGHNVD 7.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because EPSS predicts 95% probability of exploitation within the next 30 days (top 0.2% of all CVEs). NVD baseline CVSS 7.5 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Weaponized
7.5
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • 361 internet-exposed hosts are running an affected version right now
  • High exploitation likelihood — EPSS 95%
CISA-KEV: Not listedEPSS: 95%CVSS: 7.5Exploit: NoneExposed: 361

A fix is available — apply it.

Apache httpd allows remote attackers to read secret data from process memory if the Limit directive can be set in a user's .htaccess file, or if httpd.conf has certain misconfigurations, aka Optionsbleed. This affects the Apache HTTP Server through 2.2.34 and 2.4.x through 2.4.27. The attacker sends an unauthenticated OPTIONS HTTP request when attempting to read secret data. This is a use-after-free issue and thus secret data is not always sent, and the specific data depends on many factors including configuration. Exploitation with .htaccess can be blocked with a patch to the ap_limit_section function in server/core.c.

Live · internet exposure

361 internet-exposed hosts are running an affected version of CVE-2017-9798 right now.

across 47 countries (United States, Japan, Poland, Germany, Netherlands)top: http_server
See the live KEV-Exposure radar →Found passively from public internet-scan data — aggregate, host-redacted.

EchelonGraph is the only CVE feed that fuses live vulnerability intelligence with its own live internet-exposure radar — so you see not just that a CVE is exploited, but how much of the internet is exposed to it right now.

CVSS v3
7.5
EG Score
9.0(high)
EG Risk
83(Track)
EG Risk 83/100SSVC: Track

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 computed
Severity90% × 45%
Exploitation95% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
99.8%
KEV
Not listed

Published

September 18, 2017

Last Modified

May 13, 2026

References (111)

Vendor Advisories for CVE-2017-9798(5)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(14)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuapache2-bin (2.4.25-3ubuntu2.3) @ zesty2026-05-22ubuntu
ubuntuapache2.2-bin (2.2.22-1ubuntu1.14) @ precise2026-05-22ubuntu
redhatjbcs-httpd24-mod_cluster-native-0:1.3.8-1.Final_redhat_1.jbcs.el62017-12-15redhat
redhatjbcs-httpd24-mod_cluster-native-0:1.3.8-1.Final_redhat_1.jbcs.el72017-12-15redhat
redhathttpd2017-12-15redhat
redhatmod_cluster-native-0:1.2.13-9.Final_redhat_2.ep6.el72017-11-16redhat
redhathttpd-0:2.4.6-40.el7_2.62017-11-13redhat
redhathttpd-0:2.2.15-47.el6_7.52017-11-13redhat
redhathttpd-0:2.4.6-45.el7_3.52017-11-13redhat
redhattomcat7-0:7.0.54-28_patch_05.ep6.el72017-11-02redhat
redhatpatch2017-11-02redhat
redhathttpd24-nghttp2-0:1.7.1-6.el72017-10-24redhat
redhathttpd-0:2.2.15-60.el6_9.62017-10-19redhat
redhathttpd-0:2.4.6-67.el7_4.52017-10-11redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Additional Vendor Advisories

(10)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 7× in last 7d / 13× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 01:31 UTCEG score recompute
  2. 2026-07-22 22:11 UTCEG score recompute
  3. 2026-07-22 14:04 UTCEPSS rescore
  4. 2026-07-20 17:04 UTCEPSS rescore
  5. 2026-07-20 17:04 UTCEPSS rescore
  6. 2026-07-19 02:26 UTCEPSS rescore
  7. 2026-07-19 02:26 UTCEPSS rescore
  8. 2026-07-11 17:41 UTCOSV refresh
  9. 2026-07-01 15:03 UTCEPSS rescore
  10. 2026-06-30 23:19 UTCEPSS rescore
  11. 2026-06-30 23:19 UTCEPSS rescore
  12. 2026-06-28 04:53 UTCEPSS rescore
  13. 2026-06-28 04:53 UTCEPSS rescore
  14. 2026-06-23 00:00 UTCOSV refresh
  15. 2026-06-22 14:23 UTCEPSS rescore
  16. 2026-06-22 14:23 UTCEPSS rescore
  17. 2026-06-21 01:57 UTCEPSS rescore
  18. 2026-06-21 01:57 UTCEPSS rescore
  19. 2026-06-18 17:50 UTCEPSS rescore
  20. 2026-06-17 17:50 UTCEPSS rescore
  21. 2026-06-15 17:45 UTCEPSS rescore
  22. 2026-06-14 23:14 UTCEPSS rescore
  23. 2026-06-14 23:14 UTCEPSS rescore
  24. 2026-06-05 18:27 UTCOSV refresh
  25. 2026-06-04 13:10 UTCEPSS rescore
Show 15 more
  1. 2026-06-04 13:10 UTCEPSS rescore
  2. 2026-05-31 22:28 UTCEPSS rescore
  3. 2026-05-29 13:41 UTCEPSS rescore
  4. 2026-05-27 13:38 UTCEPSS rescore
  5. 2026-05-27 13:38 UTCEPSS rescore
  6. 2026-05-26 07:17 UTCEPSS rescore
  7. 2026-05-26 07:17 UTCEPSS rescore
  8. 2026-05-22 09:45 UTCEG score recompute
  9. 2026-05-22 09:45 UTCVendor advisory
  10. 2026-05-22 09:45 UTCGHSA enrichment
  11. 2026-05-21 22:40 UTCEPSS rescore
  12. 2026-05-21 22:40 UTCEPSS rescore
  13. 2026-05-18 21:30 UTCEPSS rescore
  14. 2026-05-18 21:30 UTCEPSS rescore
  15. 2026-05-18 21:30 UTCEPSS rescore

Publicly available exploits

(5 references)

Working exploit code is in the public domain (1 Metasploit module) (3 GitHub PoCs) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCbrokensound77/OptionsBleed-POC-Scanner
    First seen Sep 27, 2017

    OptionsBleed (CVE-2017-9798) PoC / Scanner

    Open source ↗
  • GitHub PoCpabloec20/optionsbleed
    First seen Sep 20, 2017

    CVE-2017-9798

    Open source ↗
  • Exploit-DBEDB-42745
    First seen Sep 18, 2017

    Apache < 2.2.34 / < 2.4.27 - OPTIONS Memory Leak

    Open source ↗
  • GitHub PoCnitrado/CVE-2017-9798
    First seen Sep 18, 2017

    Checks a shared hosting environment for CVE-2017-9798

    Open source ↗
  • Metasploitauxiliary/scanner/http/apache_optionsbleed✓ verified
    First seen Sep 18, 2017

    Apache Optionsbleed Scanner

    Open source ↗

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2017-9798?
CVE-2017-9798 is a high vulnerability published on September 18, 2017. Apache httpd allows remote attackers to read secret data from process memory if the Limit directive can be set in a user's .htaccess file, or if httpd.conf has certain misconfigurations, aka Optionsbleed. This affects the Apache HTTP Server through 2.2.34 and 2.4.x through 2.4.27. The attacker…
When was CVE-2017-9798 disclosed?
CVE-2017-9798 was first published in the National Vulnerability Database on September 18, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-9798 actively exploited?
CVE-2017-9798 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-9798?
CVE-2017-9798 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
How do I remediate CVE-2017-9798?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-9798, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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