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CVE

CVE-2026-78183

DBD::Pg version 3.21.0 for Perl has a heap out-of-bounds write in quote_float
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CVE

CVE-2026-78183

DBD::Pg version 3.21.0 for Perl has a heap out-of-bounds write in quote_float

DBD::Pg version 3.21.0 for Perl has a heap out-of-bounds write in quote_float.

quote_float() allocates the length of the string + 1, which is the size of the bare numeric symbol plus NULL.  But for special literals NaN, Inf, +Inf, -Inf, Infinity, +Infinity, -Infinity it emits the literal surrounded by quotes plus NULL, which is length + 3 bytes. Every recognised literal (case-insensitive) overflows by 2 bytes, a single quote and a NULL.

This can be reached by the $dbh->quote method, for example

    $dbh->quote( "Infinity", DBI::SQL_NUMERIC ).

This regression was introduced in 3.21.0 by the quote.c rewrite.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

http://www.openwall.com/lists/oss-security/2026/08/23/5, https://cpan.org/modules, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78183.json, https://github.com/bucardo/dbdpg/security/advisories/GHSA-785p-fw3v-r822, https://metacpan.org/release/TURNSTEP/DBD-Pg-3.21.1/source/Changes, https://nvd.nist.gov/vuln/detail/CVE-2026-78183, https://github.com/bucardo/dbdpg/commit/6d6f47ed2403cda55c82b1bad56e388ba7390065.patch, https://github.com/bucardo/dbdpg/commit/adacf1de872326a465e13f9e4281a674ebcd227e, https://github.com/bucardo/dbdpg

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.00671%
EPSS Percentile
0.50163%
Introduced Version
9459acf2885d82fe0a280f91b7724e756edc2cb1,0
Fix Available
adacf1de872326a465e13f9e4281a674ebcd227e

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