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VulnerabilityPublished

CVE-2026-93682: PHP · Out-of-bounds Read

Affects PHPSource CVE Database V5

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Not known to be exploited · CVSS 5.8 Medium · fixed in 8.5.11 : update PHP when convenient.

Data as of 8 Nov 2026, 23:24 UTC

CVSS 3.1 base score
5.8Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 27% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 8.5.11, 8.4.26, 8.3.35 +1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.

What to do

Upgrade PHP to 8.5.11, 8.4.26, 8.3.35 or 8.2.34.

Affected software

ProductAffectedFixed in
PHP GroupPHPAffected
  • ≥ 8.5.*, < 8.5.11
Fixed in
  • 8.5.11
PHP GroupPHPAffected
  • ≥ 8.4.*, < 8.4.26
Fixed in
  • 8.4.26
PHP GroupPHPAffected
  • ≥ 8.3.*, < 8.3.35
Fixed in
  • 8.3.35
PHP GroupPHPAffected
  • ≥ 8.2.*, < 8.2.34
Fixed in
  • 8.2.34

AI-suggested

If you cannot patch yet, users should be cautious when handling redirects from untrusted servers. No vendor advisory states that no action is required or that the issue is already mitigated.

Description

CVE-2026-93682 is an out-of-bounds read vulnerability in the PHP HTTP stream wrapper. When following a redirect, if the Location header is empty, the code reads one byte beyond the allocated buffer. This byte influences the redirect target, allowing a malicious server to control whether the client is redirected to the host root or the current directory. The vulnerability has a medium severity with a CVSS score of 5.8.

References

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