CVE-2026-3713

MEDIUMNVD 5.35.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 5.3 from GitHub Security Advisory published 2026-03-08. NVD baseline CVSS 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this weekElevated
5.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.3Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

A flaw has been found in pnggroup libpng up to 1.6.55. Affected by this vulnerability is the function do_pnm2png of the file contrib/pngminus/pnm2png.c of the component pnm2png. This manipulation of the argument width/height causes heap-based buffer overflow. The attack is restricted to local execution. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
40
EG Risk 40/100

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 (value × EchelonGraph’s weight)
Severity53% × 45%
The EG Score, 5.3 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
7th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

March 8, 2026

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Aug 6, 2026
Patch available.
Web page

Heap Buffer Overflow via Integer Overflow in pnm2png row_bytes Calculation · Issue #794 · pnggroup/libpng · GitHub

https://github.com/pnggroup/libpng/issues/794
Web page

GitHub - pnggroup/libpng: LIBPNG: Portable Network Graphics support, official libpng repository · GitHub

https://github.com/pnggroup/libpng/

Vendor Advisories for CVE-2026-3713(2)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatlibpng-main-1.6.56-1.hum12026-04-07redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
libpng1.61.6.37-3 ... 1.6.58-1 (45 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libpng1.61.6.39-2 ... 1.6.58-1 (40 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libpng1.61.6.48-1 ... 1.6.58-1 (17 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libpng1.61.6.48-1 ... 1.6.58-1 (12 versions)
  • every version on: no fix on record
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 30× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 203 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 104 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  2. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  4. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  5. 2026-10-12 16:11 UTCEG score recompute
  6. 2026-10-11 19:53 UTCEG score recompute
  7. 2026-10-11 17:06 UTCEG score recompute
  8. 2026-10-11 14:33 UTCEG score recompute
  9. 2026-10-11 14:06 UTCOSV refresh
  10. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  11. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  13. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  15. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  16. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  17. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  18. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  21. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  22. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  23. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  24. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  25. 2026-09-22 01:46 UTCOSV refresh
Show 74 more
  1. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  3. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  4. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  7. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  8. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-09-02 23:06 UTCOSV refresh
  15. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  20. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  22. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  26. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  27. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  28. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  29. 2026-08-16 12:16 UTCEG score recompute
  30. 2026-08-16 12:16 UTCVendor advisory
  31. 2026-08-16 12:16 UTCGHSA enrichmentGHSA-fgc7-hpwc-cmc9 · GitHub CVSS 5.3
  32. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  33. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  34. 2026-08-14 08:11 UTCEG score recompute
  35. 2026-08-14 08:11 UTCVendor advisory
  36. 2026-08-14 08:11 UTCGHSA enrichmentGHSA-fgc7-hpwc-cmc9 · GitHub CVSS 5.3
  37. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  38. 2026-08-12 23:39 UTCEG score recompute
  39. 2026-08-12 23:39 UTCVendor advisory
  40. 2026-08-12 23:39 UTCGHSA enrichmentGHSA-fgc7-hpwc-cmc9 · GitHub CVSS 5.3
  41. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  42. 2026-08-11 22:28 UTCEG score recompute
  43. 2026-08-11 22:28 UTCVendor advisory
  44. 2026-08-11 22:28 UTCGHSA enrichmentGHSA-fgc7-hpwc-cmc9 · GitHub CVSS 5.3
  45. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  46. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  47. 2026-08-10 08:39 UTCEG score recompute
  48. 2026-08-10 08:39 UTCVendor advisory
  49. 2026-08-10 08:39 UTCGHSA enrichmentGHSA-fgc7-hpwc-cmc9 · GitHub CVSS 5.3
  50. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  51. 2026-08-09 07:50 UTCEG score recompute
  52. 2026-08-09 07:50 UTCVendor advisory
  53. 2026-08-09 07:50 UTCGHSA enrichmentGHSA-fgc7-hpwc-cmc9 · GitHub CVSS 5.3
  54. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  55. 2026-08-07 19:15 UTCEG score recompute
  56. 2026-08-07 19:15 UTCVendor advisory
  57. 2026-08-07 19:15 UTCGHSA enrichmentGHSA-fgc7-hpwc-cmc9 · GitHub CVSS 5.3
  58. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  59. 2026-08-06 02:19 UTCEG score recompute
  60. 2026-08-06 02:19 UTCVendor advisory
  61. 2026-08-06 02:19 UTCGHSA enrichmentGHSA-fgc7-hpwc-cmc9 · GitHub CVSS 5.3
  62. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  63. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  64. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  65. 2026-08-04 01:44 UTCEG score recompute
  66. 2026-08-04 01:44 UTCVendor advisory
  67. 2026-08-04 01:44 UTCGHSA enrichmentGHSA-fgc7-hpwc-cmc9 · GitHub CVSS 5.3
  68. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  69. 2026-08-02 18:31 UTCEG score recompute
  70. 2026-08-02 18:31 UTCVendor advisory
  71. 2026-08-02 18:31 UTCGHSA enrichmentGHSA-fgc7-hpwc-cmc9 · GitHub CVSS 5.3
  72. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  73. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  74. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile

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Frequently asked(5)

What is CVE-2026-3713?
CVE-2026-3713 is a medium-severity vulnerability; its CVE record was published on March 8, 2026. A flaw has been found in pnggroup libpng up to 1.6.55. Affected by this vulnerability is the function do_pnm2png of the file contrib/pngminus/pnm2png.c of the component pnm2png. This manipulation of the argument width/height causes heap-based buffer overflow. The attack is restricted to local…
When was the CVE record for CVE-2026-3713 published?
The CVE record for CVE-2026-3713 was published on March 8, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of June 17, 2026; the record at its source may have been updated since.
Is CVE-2026-3713 actively exploited?
CVE-2026-3713 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (7th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-3713?
CVE-2026-3713 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-3713?
A fix for CVE-2026-3713 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-3713 are linked in the Vendor Advisories panel on this page.

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