CVE-2026-92842

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (27th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 5.9Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

The convert.base64-encode, convert.quoted-printable-encode and convert.quoted-printable-decode stream filters accept a line-break-chars option whose length is tracked separately from the string itself. The filter constructors duplicate the value with pestrdup(), which stops at the first NUL byte, while keeping the original length. When the filter later emits a line break it copies the recorded length out of the truncated allocation, reading past its end and placing adjacent heap bytes into the filter output.

CVSS v3
5.9
EG Score
5.9MEDIUMmedium confidence
EG Risk
27
EG Risk 27/100CISA 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 computed
Severity59% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
27th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (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

September 25, 2026

Last Modified

September 29, 2026

Advisory Details (1)

Auto-updated Sep 25, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

OOB read / info leak in convert.* stream filters when line-break-chars contains NUL · Advisory · php/php-src · GitHub

https://github.com/php/php-src/security/advisories/GHSA-88hq-2827-7pg6

Vendor Advisories for CVE-2026-92842(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatphp-main-8.5.11-2.hum12026-09-23redhat

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.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 23× in last 7d / 29× 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. 2026-10-04 01:43 UTCEG score recompute
  2. 2026-10-04 01:43 UTCVendor advisory
  3. 2026-10-03 00:53 UTCEG score recompute
  4. 2026-10-03 00:53 UTCVendor advisory
  5. 2026-10-02 00:03 UTCEG score recompute
  6. 2026-10-02 00:03 UTCVendor advisory
  7. 2026-10-01 19:51 UTCEPSS rescore
  8. 2026-09-30 23:09 UTCEG score recompute
  9. 2026-09-30 23:09 UTCVendor advisory
  10. 2026-09-30 15:04 UTCEPSS rescore
  11. 2026-09-29 22:16 UTCEG score recompute
  12. 2026-09-29 22:16 UTCVendor advisory
  13. 2026-09-29 15:15 UTCEG score recompute
  14. 2026-09-29 15:15 UTCVendor advisory
  15. 2026-09-28 14:26 UTCEG score recompute
  16. 2026-09-28 14:26 UTCVendor advisory
  17. 2026-09-28 13:52 UTCEPSS rescore
  18. 2026-09-28 13:52 UTCEPSS rescore
  19. 2026-09-28 13:44 UTCEG score recompute
  20. 2026-09-28 13:44 UTCVendor advisory
  21. 2026-09-28 00:10 UTCEG score recompute
  22. 2026-09-28 00:10 UTCVendor advisory
  23. 2026-09-27 13:49 UTCEPSS rescore
  24. 2026-09-26 23:20 UTCEG score recompute
  25. 2026-09-26 23:20 UTCVendor advisory
Show 4 more
  1. 2026-09-26 15:59 UTCEPSS rescore
  2. 2026-09-25 22:23 UTCEG score recompute
  3. 2026-09-25 21:20 UTCEG score recompute
  4. 2026-09-25 21:19 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-92842?
CVE-2026-92842 is a medium vulnerability published on September 25, 2026. The convert.base64-encode, convert.quoted-printable-encode and convert.quoted-printable-decode stream filters accept a line-break-chars option whose length is tracked separately from the string itself. The filter constructors duplicate the value with pestrdup(), which stops at the first NUL byte,…
When was CVE-2026-92842 disclosed?
CVE-2026-92842 was first published on September 25, 2026, with the most recent update on September 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-92842 actively exploited?
CVE-2026-92842 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (27th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-92842?
CVE-2026-92842 has a CVSS base score of 5.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-92842?
A fix for CVE-2026-92842 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-92842 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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