CVE-2026-73194: DBI versions before 1.652 for Perl allow a heap out-of-bounds write via an unvalidated numeric placeholder that sets the binder counter in preparse
Noroxi assessment
Priority: Monitor (action score 36/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.49% (FIRST EPSS).
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
- According to CISA the attack is automatable: targets can be found by mass scanning.
- Fixed version: perl-DBI (AlmaLinux:10) 1.643-26.el10_2.6; perl-DBI (AlmaLinux:8) 1.641-10.module_el8.10.0+4282+4ee1dbd0, 1.641-3.el8_10; perl-DBI (AlmaLinux:9) 1.643-9.el9_8.6.
Low priority for now. Upgrade to perl-DBI (AlmaLinux:10) 1.643-26.el10_2.6; perl-DBI (AlmaLinux:8) 1.641-10.module_el8.10.0+4282+4ee1dbd0, 1.641-3.el8_10; perl-DBI (AlmaLinux:9) 1.643-9.el9_8.6 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
DBI versions before 1.652 for Perl allow a heap out-of-bounds write via an unvalidated numeric placeholder that sets the binder counter in preparse. preparse reserves seven output bytes per input byte, the width of the longest ':p99999' expansion. The ':N' branch parses the number with `atoi(src)` and assigns it to the binder counter with no range check, so a statement containing ':2147483648' leaves the counter negative (-2147483648 with glibc, where atoi wraps). Each following '?' then expands through `sprintf(start, ":p%d", idx++)` to ':p-2147483648', 14 bytes with the terminating NUL where the buffer budgets 7. The placeholder limit added in 1.650 tests the counter against 99,999, which a negative counter passes. Any caller that preparses an untrusted statement into ':pN' style placeholders gets a heap out-of-bounds write that grows with the number of '?' marks following the poisoned placeholder. The '?' and '%s' return styles compare the parsed number against the expected sequence and error out, and are unaffected.
- Published
- Aug 15, 2026
- Updated
- Aug 28, 2026
- EPSS
- 0.4% · 42th percentile
- CWE
- CWE-787
Report tools
Action score
36
Monitor
Low priority for now.
- CVSS
- 36 / 40 · 9.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.4%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
—
Versions reported by the vendor
Affected version ranges reported by the assigning authority (CPANSec). Independent of NVD's CPE analysis and usually ahead of it.
cpan.org/modules DBI
- before 1.652affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:10 | perl-DBI | before 1.643-26.el10_2.6 | 1.643-26.el10_2.6 |
| AlmaLinux:8 | perl-DBI | before 1.641-10.module_el8.10.0+4282+4ee1dbd0 | 1.641-10.module_el8.10.0+4282+4ee1dbd0 |
| AlmaLinux:8 | perl-DBI | before 1.641-3.el8_10 | 1.641-3.el8_10 |
| AlmaLinux:9 | perl-DBI | before 1.643-9.el9_8.6 | 1.643-9.el9_8.6 |
| Debian:12 | libdbi-perl | before 1.643-4+deb12u2 | 1.643-4+deb12u2 |
| Debian:13 | libdbi-perl | before 1.652-2~deb13u1 | 1.652-2~deb13u1 |
| Debian:14 | libdbi-perl | before 1.652-1 | 1.652-1 |
| openSUSE:Tumbleweed | perl-DBI | before 1.653.0-1.1 | 1.653.0-1.1 |
| Red Hat:enterprise_linux:10.2 | perl-DBI | before 0:1.643-26.el10_2.6 | 0:1.643-26.el10_2.6 |
| Red Hat:enterprise_linux:10.2 | perl-DBI-debuginfo | before 0:1.643-26.el10_2.6 | 0:1.643-26.el10_2.6 |
| Red Hat:enterprise_linux:10.2 | perl-DBI-debugsource | before 0:1.643-26.el10_2.6 | 0:1.643-26.el10_2.6 |
| Red Hat:enterprise_linux:8::appstream | perl-DBI | before 0:1.641-10.module+el8.10.0+24875+bc962974 | 0:1.641-10.module+el8.10.0+24875+bc962974 |
| Red Hat:enterprise_linux:8::appstream | perl-DBI-debuginfo | before 0:1.641-10.module+el8.10.0+24875+bc962974 | 0:1.641-10.module+el8.10.0+24875+bc962974 |
| Red Hat:enterprise_linux:8::appstream | perl-DBI-debugsource | before 0:1.641-10.module+el8.10.0+24875+bc962974 | 0:1.641-10.module+el8.10.0+24875+bc962974 |
| Red Hat:enterprise_linux:8::baseos | perl-DBI | before 0:1.641-3.el8_10 | 0:1.641-3.el8_10 |
| Red Hat:enterprise_linux:8::baseos | perl-DBI-debuginfo | before 0:1.641-3.el8_10 | 0:1.641-3.el8_10 |
| Red Hat:enterprise_linux:8::baseos | perl-DBI-debugsource | before 0:1.641-3.el8_10 | 0:1.641-3.el8_10 |
| Red Hat:enterprise_linux:9::appstream | perl-DBI | before 0:1.643-9.el9_8.6 | 0:1.643-9.el9_8.6 |
| Red Hat:enterprise_linux:9::appstream | perl-DBI-debuginfo | before 0:1.643-9.el9_8.6 | 0:1.643-9.el9_8.6 |
| Red Hat:enterprise_linux:9::appstream | perl-DBI-debugsource | before 0:1.643-9.el9_8.6 | 0:1.643-9.el9_8.6 |
| Rocky Linux:10 | perl-DBI | before 0:1.643-26.el10_2.6 | 0:1.643-26.el10_2.6 |
| Rocky Linux:8 | perl-DBI | before 0:1.641-10.module+el8.10.0+40328+bc090241 | 0:1.641-10.module+el8.10.0+40328+bc090241 |
| Rocky Linux:8 | perl-DBI | before 0:1.641-10.module+el8.10.0+40328+3ea70367 | 0:1.641-10.module+el8.10.0+40328+3ea70367 |
| Rocky Linux:8 | perl-DBI | before 0:1.641-10.module+el8.10.0+40328+0878361a | 0:1.641-10.module+el8.10.0+40328+0878361a |
+3
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:perl-DBI | 1.641-10.module_el8.10.0+4282+4ee1dbd0 · AlmaLinux:8 | Package registry (OSV) |
| debian:libdbi-perl | 1.643-4+deb12u2 · Debian:12 | Package registry (OSV) |
| opensuse:perl-DBI | 1.653.0-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:perl-DBI | 0:1.641-10.module+el8.10.0+24875+bc962974 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:perl-DBI-debuginfo | 0:1.641-10.module+el8.10.0+24875+bc962974 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:perl-DBI-debugsource | 0:1.641-10.module+el8.10.0+24875+bc962974 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| rocky linux:perl-DBI | 0:1.641-10.module+el8.10.0+40328+bc090241 · Rocky Linux:8 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
- Harsh Raj Singhaniafinder
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-787 · Out-of-bounds WriteCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
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References
Show all references (3 more)Show less
Vendor advisories and official records. Exploit/PoC links are deliberately left out.