CVE catalog

CVE-2026-82531

Severity: Critical · CVSS 9.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: Oct 6, 2026, 1:16:50 PM UTC
Updated: Oct 6, 2026, 1:16:50 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.82% · Oct 25, 2026

Smarty before 4.5.8 and 5.x before 5.8.5 contains a code injection vulnerability where the top-level nocache_hash is never restored during extends:/multi-component template inheritance, leaving it null. Attackers can supply assigned data containing a forged SmartyNocache marker that is copied verbatim into the regenerated PHP cache file, executing arbitrary PHP on include for remote code execution.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	smarty3	sid	`3.1.48-2`	vulnerable
Debian	smarty3	forky	`3.1.48-2`	vulnerable
Debian	smarty3	trixie	`3.1.48-2`	vulnerable
Debian	smarty3	bookworm	`3.1.47-2+deb12u1`	vulnerable
Debian	smarty3	bookworm-security	`3.1.47-2+deb12u1`	vulnerable
Debian	smarty4	sid	`4.5.5-1`	vulnerable
Debian	smarty4	forky	`4.5.5-1`	vulnerable
Debian	smarty4	trixie	`4.5.5-1`	vulnerable
Debian	smarty4	bookworm	`4.3.0-1+deb12u2`	vulnerable
Debian	smarty4	bookworm-security	`4.3.0-1+deb12u2`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	smarty3	source	sid	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	smarty3	source	forky	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	smarty3	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	smarty3	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	smarty4	source	sid	`(unfixed)`	not yet assigned	Not reported	[1150192]
Debian	smarty4	source	forky	`(unfixed)`	not yet assigned	Not reported	[1150192]
Debian	smarty4	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1150192]
Debian	smarty4	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1150192]

[Debian bug #1150192]

Notes

[trixie] smarty3: Minor issue [bookworm] smarty3: minor issue [trixie] smarty4: Minor issue [bookworm] smarty4: minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[smarty3]Affected
Details (4)
- 3.1.47-2+deb12u1 · all · bookworm
  Affected
  nvd · smarty3 · debian · bookworm; nvd · smarty3 · debian · 12
- 3.1.47-2+deb12u1 · all · bookworm
  Affected
  nvd · smarty3 · debian · bookworm; nvd · smarty3 · debian · 12
- 3.1.47-2+deb12u1 · all · bookworm-security
  Affected
  nvd · smarty3 · debian · bookworm; nvd · smarty3 · debian · 12
- 3.1.47-2+deb12u1 · all · bookworm-security
  Affected
  nvd · smarty3 · debian · bookworm; nvd · smarty3 · debian · 12
[smarty4]Affected
Details (4)
- 4.3.0-1+deb12u2 · all · bookworm
  Affected
  nvd · smarty4 · debian · bookworm; nvd · smarty4 · debian · 12
- 4.3.0-1+deb12u2 · all · bookworm
  Affected
  nvd · smarty4 · debian · bookworm; nvd · smarty4 · debian · 12
- 4.3.0-1+deb12u2 · all · bookworm-security
  Affected
  nvd · smarty4 · debian · bookworm; nvd · smarty4 · debian · 12
- 4.3.0-1+deb12u2 · all · bookworm-security
  Affected
  nvd · smarty4 · debian · bookworm; nvd · smarty4 · debian · 12

[Debian 13 (Trixie)]

[smarty3]Affected
Details (2)
- 3.1.48-2 · all · trixie
  Affected
  nvd · smarty3 · debian · 13
- 3.1.48-2 · all · trixie
  Affected
  nvd · smarty3 · debian · 13
[smarty4]Affected
Details (2)
- 4.5.5-1 · all · trixie
  Affected
  nvd · smarty4 · debian · 13
- 4.5.5-1 · all · trixie
  Affected
  nvd · smarty4 · debian · 13

Observed: Oct 23, 2026, 7:40:37 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]