Imager versions from 0.45_02 before 1.034 for Perl may expose adjacent heap bytes via strlen() over-read from zero-count ASCII EXIF entries in copy_string_tags

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-19082
StatePUBLISHED
AssignerCPANSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-07 18:17:11 UTC
Updated2026-08-07 21:17:27 UTC
DescriptionImager versions from 0.45_02 before 1.034 for Perl may expose adjacent heap bytes via strlen() over-read from zero-count ASCII EXIF entries in copy_string_tags. copy_string_tags() computes an ASCII EXIF tag's length as `entry->size - 1` to strip the trailing NUL. A zero-count ASCII entry sets `entry->size` to 0, and the derived length reaches i_tags_add() as -1, which is interpreted as a request to call strlen(), scanning past the entry to the next NUL and copying those bytes into the tag. JPEG reaches this path via im_decode_exif(), as does the separate Imager::File::WEBP distribution, which is fixed by upgrading Imager. Any caller of Imager->read() on an attacker-supplied image with such an entry may receive an exif_* tag holding adjacent heap bytes instead of an empty string.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.002920000 probability, percentile 0.214540000 (date 2026-08-10)

Problem Types: CWE-125 | CWE-125 CWE-125 Out-of-bounds Read

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA TONYC Imager affected 0.45_02 1.034 custom Not specified

References

ReferenceSourceLinkTags
github.com/tonycoz/imager/security/advisories/GHSA-hx46-55wp-hv6m 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
www.openwall.com/lists/oss-security/2026/08/07/6 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
metacpan.org/release/TONYC/Imager-1.034/changes 9b29abf9-4ab0-4765-b253-1875cd9b441e metacpan.org
github.com/tonycoz/imager/commit/24bde0427a113264d53f45a9c29ae756d84c82f... 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Arpit Jain (arpitjain099) (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-08-07T00:00:00.000ZVersion 1.034 released with fix.

Solutions

CNA: Upgrade to Imager 1.034 or later.

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