CVE-2026-78183

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-23. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

August 23, 2026

Last Modified

August 26, 2026

Advisory Details (4)

Auto-updated Aug 26, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

oss-security - CVE-2026-78183: DBD::Pg version 3.21.0 for Perl has a heap out-of-bounds write in quote_float

http://www.openwall.com/lists/oss-security/2026/08/23/5
generic

Client Challenge

https://metacpan.org/release/TURNSTEP/DBD-Pg-3.21.1/source/Changes
github_commit

commit adacf1de8723 (bucardo/dbdpg)

Fix landed in bucardo/dbdpg commit adacf1de8723 — awaiting tagged release

https://github.com/bucardo/dbdpg/commit/adacf1de872326a465e13f9e4281a674ebcd227e
generic
https://github.com/bucardo/dbdpg/commit/6d6f47ed2403cda55c82b1bad56e388ba7390065.patch

Vendor Advisories for CVE-2026-78183(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 49× in last 7d / 49× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-30 02:47 UTCEG score recompute
  2. 2026-08-30 02:47 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-29 23:05 UTCGHSA enrichment
  5. 2026-08-29 19:23 UTCGHSA enrichment
  6. 2026-08-29 15:37 UTCGHSA enrichment
  7. 2026-08-29 11:53 UTCGHSA enrichment
  8. 2026-08-29 08:06 UTCGHSA enrichment
  9. 2026-08-29 04:21 UTCGHSA enrichment
  10. 2026-08-29 00:31 UTCEG score recompute
  11. 2026-08-29 00:31 UTCGHSA enrichment
  12. 2026-08-28 21:42 UTCEPSS rescore
  13. 2026-08-28 17:33 UTCGHSA enrichment
  14. 2026-08-28 13:39 UTCGHSA enrichment
  15. 2026-08-28 09:53 UTCGHSA enrichment
  16. 2026-08-28 06:09 UTCGHSA enrichment
  17. 2026-08-28 02:24 UTCGHSA enrichment
  18. 2026-08-27 22:42 UTCGHSA enrichment
  19. 2026-08-27 19:00 UTCGHSA enrichment
  20. 2026-08-27 15:14 UTCEG score recompute
  21. 2026-08-27 15:14 UTCGHSA enrichment
  22. 2026-08-27 14:25 UTCEPSS rescore
  23. 2026-08-27 11:33 UTCGHSA enrichment
  24. 2026-08-27 07:52 UTCGHSA enrichment
  25. 2026-08-27 04:10 UTCGHSA enrichment
Show 24 more
  1. 2026-08-27 00:28 UTCGHSA enrichment
  2. 2026-08-26 20:45 UTCGHSA enrichment
  3. 2026-08-26 17:00 UTCGHSA enrichment
  4. 2026-08-26 15:08 UTCEG score recompute
  5. 2026-08-26 15:08 UTCGHSA enrichment
  6. 2026-08-26 14:47 UTCEPSS rescore
  7. 2026-08-26 11:26 UTCGHSA enrichment
  8. 2026-08-26 07:43 UTCGHSA enrichment
  9. 2026-08-26 04:01 UTCGHSA enrichment
  10. 2026-08-26 00:18 UTCEG score recompute
  11. 2026-08-26 00:18 UTCGHSA enrichment
  12. 2026-08-25 20:35 UTCGHSA enrichment
  13. 2026-08-25 19:35 UTCEG score recompute▲ 9.80
  14. 2026-08-25 19:35 UTCGHSA enrichment
  15. 2026-08-25 19:34 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  16. 2026-08-25 13:49 UTCEPSS rescore
  17. 2026-08-24 14:18 UTCEPSS rescore
  18. 2026-08-23 23:32 UTCGHSA enrichment
  19. 2026-08-23 23:32 UTCNVD update
  20. 2026-08-23 23:11 UTCGHSA enrichment
  21. 2026-08-23 23:10 UTCMITRE cvelistV5
  22. 2026-08-23 20:24 UTCNVD update
  23. 2026-08-23 19:55 UTCEG score recompute
  24. 2026-08-23 19:55 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-78183?
CVE-2026-78183 is a critical vulnerability published on August 23, 2026. 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…
When was CVE-2026-78183 disclosed?
CVE-2026-78183 was first published in the National Vulnerability Database on August 23, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78183 actively exploited?
CVE-2026-78183 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 56.4% of all scored CVEs.
What is the CVSS score of CVE-2026-78183?
CVE-2026-78183 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-78183?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78183, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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